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  • programatically check if a domain is availible?

    - by acidzombie24
    Using this solution http://serverfault.com/questions/98940/bot-check-if-a-domain-name-is-availible/98956#98956 I wrote a quick script (pasted below) in C# to check if the domain MIGHT be available. A LOT of results come up with taken domains. It looks like all 2 and 3 letter .com domains are taken and it looks like all 3 letter are taken (not including numbers which many are available). Is there a command or website to take my list of domains and check if they are registered or available? using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Text.RegularExpressions; using System.Diagnostics; using System.IO; namespace domainCheck { class Program { static void Main(string[] args) { var sw = (TextWriter)File.CreateText(@"c:\path\aviliableUrlsCA.txt"); int countIndex = 0; int letterAmount=3; char [] sz = new char[letterAmount]; for(int z=0; z<letterAmount; z++) { sz[z] = '0'; } //*/ List<string> urls = new List<string>(); //var sz = "df3".ToCharArray(); int i=0; while (i <letterAmount) { if (sz[i] == '9') sz[i] = 'a'; else if (sz[i] == 'z') { if (i != 0 && i != letterAmount - 1) sz[i] = '-'; else { sz[i] = 'a'; i++; continue; } } else if (sz[i] == '-') { sz[i] = 'a'; i++; continue; } else sz[i]++; string uu = new string(sz); string url = uu + ".ca"; Console.WriteLine(url); Process p = new Process(); p.StartInfo.UseShellExecute = false; p.StartInfo.RedirectStandardError = true; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.FileName = "nslookup "; p.StartInfo.Arguments = url; p.Start(); var res = ((TextReader) new StreamReader( p.StandardError.BaseStream)).ReadToEnd(); if (res.IndexOf("Non-existent domain") != -1) { sw.WriteLine(uu); if (++countIndex >= 100) { sw.Flush(); countIndex = 0; } urls.Add(uu); Console.WriteLine("Found domain {0}", url); } i = 0; } Console.WriteLine("Writing out list of urls"); foreach (var u in urls) Console.WriteLine(u); sw.Close(); } } }

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  • Windows startup Powershell script not closing after Start-Process

    - by Matthew Phipps
    I've got a Powershell V2.0 startup script for my work computer (XP Professional 64-bit), as follows: start "C:\Program Files (x86)\Microsoft Office\Office12\OUTLOOK.EXE" -ArgumentList "/recycle" sleep -S 2 start "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -ArgumentList "https://mail.google.com" sleep -S 2 start "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -ArgumentList "-new-window https://www.google.com/calendar" sleep -S 2 start "C:\Program Files (x86)\Skype\Phone\Skype.exe" The sleeps are to ensure that the windows appear on the taskbar in the correct order. I run this from a shortcut on my Quick Launch with the following Target: C:\WINDOWS\system32\WindowsPowerShell\v1.0\powershell.exe C:\scripts\initialize.ps1 (Yes, this is 2.0: powershell -Version 2.0 works, as does -Version 1.0, but not -Version 3.0) Problem is, the command window stays open until the Firefox windows are closed, which is not what I want. Looking at Process Explorer when I run the script, here's what happens: powershell.exe appears under explorer.exe and the Powershell window appears (with a black background, oddly. But it's not cmd.exe, since when I was debugging the script error messages would appear in red). outlook.exe appears under powershell.exe and the Outlook window appears. firefox.exe appears under powershell.exe and a Firefox window appears. A second firefox.exe appears under powershell.exe and another Firefox window appears. The second Firefox process then exits, as expected, since Firefox only uses one process. skype.exe appears under powershell.exe and the Skype window appears. The powershell.exe process inexplicably sticks around, as does the Powershell window. If I close both Firefox windows, the powershell.exe process exits and the Powershell window closes, and the outlook.exe and skype.exe processes appear under explorer.exe as expected. I suspect this has something to do with Firefox's standard input, output and error: I wouldn't expect Outlook or Skype to ever output anything to the console, but Firefox has command-line options that allow it to do so. I've looked over my about:config's user set values and didn't find anything suspicious. Finally, if I have a firefox.exe instance already running (started from the desktop shortcut) the problem doesn't occur (the powershell.exe process exits as it ought to). So what's going on here? I'm going to try adding -WindowStyle hidden to the shortcut next (gotta close this Firefox to test it), but I want to get to the bottom of this, if only to improve my understanding of how Windows consoles work.

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  • What is good usage scenario for Rackspace Cloud Files CDN (powered by AKAMAI) [closed]

    - by Andrew Smith
    I have just setup my website as static page via Rackspace CDN / Akamai. www.example.co.uk is an alias for d9771e6f24423091aebc-345678991111238fabcdef6114258d0e1.r61.cf3.rackcdn.com. d9771e6f24423091aebc-345678991111238fabcdef6114258d0e1.r61.cf3.rackcdn.com is an alias for a61.rackcdn.com. a61.rackcdn.com is an alias for a61.rackcdn.com.mdc.edgesuite.net. a61.rackcdn.com.mdc.edgesuite.net is an alias for a63.dscg10.akamai.net. a63.dscg10.akamai.net has address 63.166.98.41 a63.dscg10.akamai.net has address 63.166.98.40 a63.dscg10.akamai.net has IPv6 address 2001:428:4c02::cda8:ecb9 a63.dscg10.akamai.net has IPv6 address 2001:428:4c02::cda8:ed09 The HTTP header: HTTP/1.0 200 OK Last-Modified: Fri, 19 Oct 2012 23:27:41 GMT ETag: fdf9e14b77def799e09e8ce815a521da X-Timestamp: 1350689261.23382 Content-Type: text/html X-Trans-Id: tx457979be3bd746c2b4e5403a1189cdbc Cache-Control: public, max-age=900 Expires: Sat, 27 Oct 2012 22:18:56 GMT Date: Sat, 27 Oct 2012 22:03:56 GMT Content-Length: 7124 Connection: keep-alive I am wondering, if it's really the fastest solution to power the website? By investigating it thru http://www.just-ping.com/ it seems, that from many places the ping is very high, and during quick investigation I found that they use GeoIP to resolve addresses based on WHOIS, which is not accurate and because of that from many places the ping is above 300ms (for example, if ISP is in balgladore and request is routed to bangladore even if it's 300ms, for period of 1 month), while by just using Amazon Web Services and Route 53 Anycast DNS servers and only 4 EC2 instances it seems that for example India is always below 100ms, while using Akamai it goes above 300ms in some cases, and this is because Route 53 is using BGP. By quickly checking the Akamai, it seems that they are not getting feedback from the traffic - the high ping stays constant even if I keep downloading large files and videos, which is opposite to what they say on their website. They state, that they optimize the performance by taking feedback from the requests, while it seems they just use GeoIP with per City resolution (which are mostly big cities). Because of this, AWS with Route 53 / Anycast DNS seems to be much more reliable, as well EdgeCast which is using BGP, but I dont know how much does it cost to deploy static website. Actually, I dont know if EdgeCast is not a lie, because from isolated places there are many errors - so their performance is at the cost of quality of delivery, because of BGP switching the routes during transfer of large files. So I was wondering, what is really Akamai good for, because they dont seem to pose any strength in any field in what I do understand now, except they offer some software based WAF on their website, but what I really care about is the core distribiution, so the question is? Is really Akamai good for Videos? For static websites? ??? I found so far AWS most usable with most consistent ping and stable transfers.

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  • batch file infinite loop when parsing file

    - by Bart
    Okay, this should be a really simple task but its proving to be more complicated than I think it should be. I'm clearly doing something wrong, and would like someone else's input. What I would like to do is parse through a file containing paths to directories and set permissions on those directories. An example line of the input file. There are several lines, all formatted the same way, with a different path to a directory. E:\stuff\Things\something else (X)\ (The file in question is generated under Cygwin using find to list all directories with "(X)" in the name. The file is then passed through unix2win to make it windows compatible. I've also tried manually creating the input file from within windows to rule out the file's creation method as the problem.) Here's where I'm stuck... I wrote the following quick and dirty batch file in Windows XP and it worked without any issues at all, but it will not work in server 2k8. Batch file code to run through the file and set permissions: FOR /F "tokens=*" %%A IN (dirlist.txt) DO echo y| cacls "%%A" /T /C /G "Domain Admins":f "Some Group":f "some-security-group":f What this is SUPPOSED to do (and does in XP) is loop through the specified file (dirlist.txt) and run cacls.exe on each directory it pulls from the file. The "echo y|" is in there to automagically confirm when cacls helpfully asks "are you sure?" for every directory in the list. Unfortunately, however, what it DOES is fall into an infinite loop. I've tried surrounding everything after "DO" with quotes, which prevents the endless loop but confuses cacls so it throws an error. Interestingly, I've tried running the code from after "DO" manually (obviously replacing the variable with the full path, copied straight from the file) at a command prompt and it runs as expected. I don't think it's the file or the loop, as adding quotes to the command to be executed prevents the loop from continuing past where it's supposed to... I really have no idea at this point. Any help would be appreciated. I have a feeling it's going to be something increadibly stupid... but I'm pulling my hair out so I thought I'd ask.

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  • How can I change how OS X's 'say' command pronounces a word?

    - by jwhitlock
    OS X's say command is useful for some tasks (such as Skype's 'notify me when a contact comes online), but it is pronouncing some names incorrectly. Is there a way to teach say to pronounce a word differently? For example, try: say "Hi, Joel Spolsky" The 'ol' sounds like 'ball' rather than 'old'. I'd like to add an exception that say "Pronounce Spolsky like this", rather than try to teach new linguistic rules. I bet there is a way since it can pronounce "iphone" as Apple wants. Update - After some research, here's what I've learned: Text-to-speech is split between turning the text to phonemes, and then the phonemes are turned into audio using a voice. Changing the voice doesn't effect the phonemes. The Speech Synthesis Manager has some functions for turning text to phonemes, and a method for registering a speech dictionary that will add new text-phoneme maps. However, Apple's speech dictionary must be in a binary form - I didn't find any plist XML. Using dtrace while running say, I found some interesting files opened in /System/Library/PrivateFrameworks/SpeechDictionary.framework/Resources. This is probably the speech dictionary, but they are all binary, except for Homophones, which is XML. Adding entries to Homophones does nothing - it is probably used in speech-to-text. They are also code signed by Apple - changing them may prevent some programs from working. PrefixDictionary CartNames CartLite SymbolDictionary Homophones There are ways to add text versions of application interface elements so VoiceOver works, a lot of which a developer gets for free, but there are tricky bits. The standard here appears to be to use a phonetic spelling as needed. My guesses are: say is a light layer of code on top of the Speech Synthesis Manager. It would be easy for the Apple devs to add a command line option to take the path to a speech dictionary plist for alternate phoneme mapping, but they didn't. It may be a useful open-source project to write a better say. Skype probably uses Speech Synthesis Manager directly, leaving no hooks to change the way my friend's names are pronounced, other than spelling them phonetically, which is silly. The easiest way to make a command line version of say is how JRobert suggested. Here's my quick implementation, using Doug Harris's spelling suggestion: #!/bin/sh echo $@ | tr '[A-Z]' '[a-z]' | sed "s/spolsky/spowlsky/g" | /usr/bin/say Finally, some fun command line stuff: # Apple is weird sqlite3 /System/Library/PrivateFrameworks/SpeechDictionary.framework/Resources/Tuples .dump # Get too much information about what files are being opened sudo dtrace -n 'syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0)); }' # Just fun say -v bad "Joel Spolsky Spolsky Spolsky Spolsky Spolsky, Joel Spolsky Spolsky Spolsky Spolsky Spolsky" echo "scale=1000; 4*a(1)" | bc -l | say

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  • Windows 2008 R2 IPsec encryption in tunnel mode, hosts in same subnet

    - by fission
    In Windows there appear to be two ways to set up IPsec: The IP Security Policy Management MMC snap-in (part of secpol.msc, introduced in Windows 2000). The Windows Firewall with Advanced Security MMC snap-in (wf.msc, introduced in Windows 2008/Vista). My question concerns #2 – I already figured out what I need to know for #1. (But I want to use the ‘new’ snap-in for its improved encryption capabilities.) I have two Windows Server 2008 R2 computers in the same domain (domain members), on the same subnet: server2 172.16.11.20 server3 172.16.11.30 My goal is to encrypt all communication between these two machines using IPsec in tunnel mode, so that the protocol stack is: IP ESP IP …etc. First, on each computer, I created a Connection Security Rule: Endpoint 1: (local IP address), eg 172.16.11.20 for server2 Endpoint 2: (remote IP address), eg 172.16.11.30 Protocol: Any Authentication: Require inbound and outbound, Computer (Kerberos V5) IPsec tunnel: Exempt IPsec protected connections Local tunnel endpoint: Any Remote tunnel endpoint: (remote IP address), eg 172.16.11.30 At this point, I can ping each machine, and Wireshark shows me the protocol stack; however, nothing is encrypted (which is expected at this point). I know that it's unencrypted because Wireshark can decode it (using the setting Attempt to detect/decode NULL encrypted ESP payloads) and the Monitor Security Associations Quick Mode display shows ESP Encryption: None. Then on each server, I created Inbound and Outbound Rules: Protocol: Any Local IP addresses: (local IP address), eg 172.16.11.20 Remote IP addresses: (remote IP address), eg 172.16.11.30 Action: Allow the connection if it is secure Require the connections to be encrypted The problem: Though I create the Inbound and Outbound Rules on each server to enable encryption, the data is still going over the wire (wrapped in ESP) with NULL encryption. (You can see this in Wireshark.) When the arrives at the receiving end, it's rejected (presumably because it's unencrypted). [And, disabling the Inbound rule on the receiving end causes it to lock up and/or bluescreen – fun!] The Windows Firewall log says, eg: 2014-05-30 22:26:28 DROP ICMP 172.16.11.20 172.16.11.30 - - 60 - - - - 8 0 - RECEIVE I've tried varying a few things: In the Rules, setting the local IP address to Any Toggling the Exempt IPsec protected connections setting Disabling rules (eg disabling one or both sets of Inbound or Outbound rules) Changing the protocol (eg to just TCP) But realistically there aren't that many knobs to turn. Does anyone have any ideas? Has anyone tried to set up tunnel mode between two hosts using Windows Firewall? I've successfully got it set up in transport mode (ie no tunnel) using exactly the same set of rules, so I'm a bit surprised that it didn't Just Work™ with the tunnel added.

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  • Firefox can't establish a connection to the server at www.google.com

    - by Tom
    My home page in Firefox [v4.0] and Internet Explorer [v9.0.8112.16421, Update Versions RTM (KB982861)] is currently set to Google but when I depress the quick start icon to start up either browser, I am getting the following immediate results: Unable to connect (In Firefox) Firefox can't establish a connection to the server at www.google.com. The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web. Internet Explorer cannot display the webpage What you can try: Diagnose Connection Problems More information This problem can be caused by a variety of issues, including: Internet connectivity has been lost. The website is temporarily unavailable. The Domain Name Server (DNS) is not reachable. The Domain Name Server (DNS) does not have a listing for the website's domain. There might be a typing error in the address. If this is an HTTPS (secure) address, click Tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section. For offline users You can still view subscribed feeds and some recently viewed webpages. To view subscribed feeds: Click the Favorites button , click Feeds, and then click the feed you want to view. To view recently visited webpages (might not work on all pages): Press Alt, click File, and then click Work Offline. Click the Favorites button, click History, and then click the page you want to view. Thankfully, I am able to use one browser that I have installed on my computer (Mathon v3.0.20.5000) to search online for technical assistance in this matter. I have seen several WinSock error issues mentioned; but, they are pointing to Windows XP and I am using Windows 7 Pro and remain uncertain whether anything identified as a fix for one OS will work in another. Things I've tried: HiJackThis Complete scan with Avira AntiVirus Premium. What am I overlooking? What should I do to address this problem?

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  • 2nd Year College - Learning - Microsoft Server Products

    - by Ryan
    As the title says, I just finished my first year of college (majoring in Software Engineering). Fortunately my school likes Microsoft enough, and I can get pretty much anything I want that Microsoft sells. I also can get IBM Websphere and the like for free as well. Earlier this year, I set up an oldish computer (2.6 Pentium D, x64) to run ubuntu server headless. I'm predominately a Java developer, so Apache, Maven, Nexus, Sonar, SVN, etc made it onto the machine. It worked really well for personal and school projects, especially team projects (quick ramp up). Anyways, I started to pick up C# to complement my Java knowledge (don't judge me :P), and am interested in working with some of the associated Microsoft equivalents. The machine currently has the Ubuntu install, as well as Windows 7 Ultimate. I do all of my actual development work off my laptop, also running Windows 7 Ultimate. I was wondering what software you would recommend putting on the machine. I’m not actually serving anything off the machine itself, but in Ubuntu I had it doing integration tests with Hudson on every commit, and profiling my applications, etc, etc. The machine would be running headless, and I would remote into it. Here is what I am currently leaning towards / wondering about: Windows 7 Ultimate vs Windows Server 2008 (R2) (no one is really clear why I should go with one over the other) Windows Team Foundation Sharepoint (Never used it before, kind of meh about it) IBM Websphere or Glassfish (Some Java EE web server) SQL Server 2008 A DVCS In order to better control product conflicts / limit resource use, I’m wondering if I should install things into virtual machines (I can get VmWare or Microsoft Virtualization Products) I also plan on installing everything I had running under Linux (it’s almost entirely Java based development software, so it’ll run on both, only reason I went with ubuntu during the year was because the apache build seemed better). I’m primarily looking to become familiar with enterprise software development tools, as well as get something functional that will help my development process. (IE, I’ll still use project and assign tasks even though I might be the only one to assign tasks to, just to practice doing so). Is there any other software / configuration details I should explore? Opinions on my current list? I primarily use C#, Java, and PHP. I'm familiar with ruby, and python as well. Thanks!

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  • Windows Server 2008 Software Raid 5 - Data integrity issues

    - by Fopedush
    I've got a server running Windows Server 2008 R2, with a (windows native) software raid-5 array. The array consists of 7x 1TB Western Digital RE3 and RE4 drives. I have offline backups of this array. The problem is this: I noticed a few days ago after copying a large file to the disk that there was an integrity issue with that file - it was a ~12GB file that I had downloaded via uTorrent. After moving it to the raid array, I used uTorrent to relocate the download location, and performed a re-check so I could seed it from that location. The recheck found that only 6308/6310 chunks of the copied file were intact. My next step was to write a quick powershell script that would copy files to the array, while performing a SHA1 hash of the original and resultant files and comparing them. Smaller files (100-1000MB) copied over just fine. When I started copying larger data (~15GB), I found that the hash check failed about 2/3rds of the time. The corrupt files had very, very small inconsistencies - less than .01%. I further eliminated the possibility of networking or client issues by placing this large file on the C:\ of the server, and copying it repeatedly from there to the array, seeing similar results. Copying the data via explorer, powershell, or the standard windows command prompt yield the same results. None of the copies fail or report any problems. The raid array itself is listed as healthy in disk management. After a few experiments, I shut down the server and ran memtest overnight. No errors were detected. A basic run of chkdsk found no problems, but I did not use the /R flag, as I was unsure how that might affect a software raid-5 volume. I next ran Crystal Disk Info to check the smart data on the drives - but found that CDI only detected 5 out of 7 of the disks in the array. I have no idea why. Nevertheless, CDI shows the following "caution" flags on a single one of the drives: 05 199 199 140 000000000001 Reallocated Sectors Count C5 200 200 __0 000000000001 Current Pending Sector Count Which is a little bit alarming, but I don't really know what to do with the information. I hardly feel like one reallocated sector could be causing this. At this point, I'm looking for some guidance on what to do next. I need to determine the cause of this issue, but I'm hesitant to run chkdsk /R or any bootable disk health checkers because I'm afraid they might break the array. I've considered triggering a re-sync of the array, but I'm not actually sure how to do that without doing something silly like manually dropping a disk and then restoring it. Any advice that could help me ferret out the precise cause of this issue would be greatly appreciated.

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  • Windows 7 Home hangs at "Welcome" screen

    - by White Phoenix
    I'm asking on behalf of a friend who's currently having problems with his machine. Windows 7 Home 32-bit. He's too far away for me to help by going over to his house - I'm helping him over the Internet. This is his current machine: http://www.newegg.com/Product/Product.aspx?Item=N82E16883227134 The only two changes he made to that machine is to swap out the gfx card for a EVGA GTX 460 and the PSU for a Corsair TX650. Here's what happened: He was playing a computer game (fairly CPU/GPU intensive) and had some music going in the background in foobar while playing. Suddenly, he notices the music stopped playing, so he switches to foobar to try to close it, but it freezes up (window won't respond). So he figures it's just foobar having a bad day and force quits that program. Suddenly, his game won't respond, so he force quits that, then the entire computer just went to crap at that point, so he hits the restart button on his machine. Computer POSTS fine, but now he gets stuck at the Windows "welcome" screen (his account is set to auto-login). HD activity light is solid yellow but he doesn't hear HDD activity. He tried booting into Safe Mode - gets stuck at the "welcome screen". Tried a STartup Repair within Windows 7, it found a few problems, but still gets stuck at welcome. I advised him to boot off the DVD - sfc /scannow found nothing (couldn't use the regular /scannow option; says there's a repair pending, had to use use offbootdir/offwindir command switches). Ran startup repair 3 times - found nothing. My friend runs virus/malware scans on a regular basis, so he's fairly sure it's not that either. Right now I'm having my friend run chkdsk /R on the computer while in this Startup Recovery mode - so far it's caught a few bad sectors. However at this point I'm kinda wondering which way to go if chkdsk doesn't fix it. Quick Google search said someone had success by booting Windows with bootlogging on - some others have success with running the aforemented chkdsk, etc. The fact that Windows cannot even boot into Safe Mode concerns me. While we're waiting for chkdsk /R to finish, are there any other options I can give my friend short of reinstalling Windows 7? He has his data on a separate partition so that's not a major problem (though it'll be an annoyance for him). I suspect his hard drive may be having some issues, but my main concern is getting him back up and running before we start diagnosing the hard drive (I may have him run some sort of SMART test utility later).

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  • Alternative Windows Offline Files + Windows Backup + Previous Version Setup

    - by Herson
    Currently our documents are all hosted in a Windows 7 box. Users can access the files using Windows share and the documents are available offline (windows 7 feature). The documents are being backed up daily by Windows 7 backup and restore utility. Users can access previous versions of the file (from the backups) using Windows Explorer "previous versions" feature. This setup is currently working well, except for the following: We would prefer to have access to hourly versions of the file, not daily. The previous version mechanism is tied up to the backup mechanism. Windows 7 performs a full backup every week and incremental backup everyday. The previous versions of a file is actually what are the available in the backups. If you 20GB documents and want to maintain at least three(3) year history, you will use at minimum 3 years * 52 weeks * 20GB or about 3TB even if there are few changes in the documents. Its pretty inefficient use of space. Looking up previous versions of a file is very slow (tens of minutes). This is probably related to the previous issue - Windows has to traverse its all of its backups. I am considering using SVN + autocommit/autoupdate tortoisesvn. It will have the following advantages: Backups are easy and will also backup the whole history of each documents. (Just backup the repository). Creating previous versions can be frequent. I think svn commit / update can be done every two minutes or so. Users can sync over the net. However, I can see the following issues: More conflicts than the original setup because both multiple users can now edit the same file even both are online, i.e. can connect to the SVN repo. The users can off course lock the file first before editing, but that would mean they have to adjust. Delay on propagation of file changes. On windows 7 file sharing, changes made by one online user will be instantaneously available to other online users. With the SVN setup, changes will only be propagated when the users execute the svn add/commit/update sequence. Delay will be probably a few minutes. This workflow will no longer work: "Hi, I just edited document X, can you have a quick look?" I would like to ask the opinion of the community for alternative setups, or improvements on the above setups to work out the kinks.

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  • Varnish server in front of nginx server with multiple virtualhosts

    - by Garreth 00
    I have tried to search for a solution for this, but can't find any documentation/tips on my specific setup. My setup: Backendserver: ngnix: 2 different websites (2 top domains) in virtualenv, running gunicorn/python/django Backendserver hardware(VPS) 2gb ram, 8 CPU Databaseserver: postgresql - pg_bouncer Backendserver hardware (VPS) 1gb ram, 8 CPU Varnishserver: only running varnish Varnishserver hardware (VPS) 1gb ram, 8 CPU I'm trying to set up a varnish server to handle rare spike in traffic (20 000 unique req/s) The spike happens when a tv program mention one of the sites. What do I need to do, to make the varnish server cache both sites/domains on my backendserver? My /etc/varnish/default.vcl : backend django_backend { .host = "local.backendserver.com"; .port = "8080"; } My /usr/local/nginx/site-avaible/domain1.com upstream gunicorn_domain1 { server unix:/home/<USER>/.virtualenvs/<DOMAIN1>/<APP1>/run/gunicorn.sock fail_timeout=0; } server { listen 80; listen 8080; server_name domain1.com; rewrite ^ http://www.domains.com$request_uri? permanent; } server { listen 80 default_server; listen 8080; client_max_body_size 4G; server_name www.domain1.com; keepalive_timeout 5; # path for static files root /home/<USER>/<APP>-media/; location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { proxy_pass http://gunicorn_domain1; break; } } } My /usr/local/nginx/site-avaible/domain2.com upstream gunicorn_domain2 { server unix:/home/<USER>/.virtualenvs/<DOMAIN2>/<APP2>/run/gunicorn.sock fail_timeout=0; } server { listen 80; listen 8080; server_name domain2.com; rewrite ^ http://www.domains.com$request_uri? permanent; } server { listen 80; listen 8080; client_max_body_size 4G; server_name www.domain2.com; keepalive_timeout 5; # path for static files root /home/<USER>/<APP>-media/; location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; if (!-f $request_filename) { proxy_pass http://gunicorn_domain2; break; } } } Right now, If I try the Ip of the varnishserver I only get served domain1.com. Would everything be correct if I change the DNS of the two domain to point to the varnishserver, or is there extra setup before it would work? Question 2: Do I need a dedicated server for varnish, or could I just install varnish on my backendserver, or would the server run out of memory quick?

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  • Have a server, need to figure out a method of backup

    - by PolishHurricane
    My company has an older Dell 2650 server running ArchLinux x64: http://www.dell.com/downloads/global/products/pedge/en/2650_specs.pdf (2 x 2.4GHz Intel Xeon w/around 3287 RAM according to "free -m") We use it to host our internal company site and to post some information from our orders to and we'd like the ability to keep it up as much as possible. What we require: - It needs to always be functional from 8am to 4pm for our data entry person to use it and others to do other things required on it. - If it goes down, we need a quick way to get the machine running again. - If it goes down, we would like to have the data backed up. Some of the major problems include: - The servers old and it may have memory issues - We don't know when one of the hard drives could fail - Our power goes out here once in a while We have a battery backup, but that's pretty much it and it's not for long term. If the server does go down, we have another system in place to store order information that comes in while it's down and repost it when it's back, but we need it up during the day. So we're wondering, what should we get for options? These are the things we thought of, sort of: Setup RAID 1, but that would involve wiping everything right? If we do that, how would we transfer the data over without messing up the server? We could buy an extra server or 2 off eBay for $100, the same model, is that practical or should we get something else? Should we buy a PC or another better server and host off that because it is if anything easier to exchange parts? Should we keep extra parts handy incase it implodes? Should we buy/use backup software? We hear drobo's are cool, but suck. Perhaps there is a software solution to this problem that backs up to another machine or gets us up and running again quickly. Also, if we are to purchase hardware, what is decent? Does anybody know of one for ArchLinux/Linux? We both know a ton about computers but we're kind of unsure what step to take with this, especially with this type of server. Thanks

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  • Make mod_wsgi use python2.7.2 instead of python2.6?

    - by guron
    i am running Ubuntu 10.04.1 LTS and it came pre-packed with python2.6 but i need to replace it with python2.7.2. (The reason is simple, 2.7 has a lot of features backported from 3 ) i had installed python2.7.2 using ./configure make make altinstall the altinstall option installed it, without touching the system default version, to /usr/local/lib/python2.7 and placed the interpreter in /usr/local/bin/python2.7 Then to help mod_wsgi find python2.7 i added the following to /etc/apache2/sites-available/wsgisite WSGIPythonHome /usr/local i start apache and run a test wsgi app BUT i am greeted by python 2.6.5 and not Python2.7 Later i replaced the default python simlink to point to python 2.7 ln -f /usr/local/bin/python2.7 /usr/bin/python Now typing 'python' on the console opens python2.7 but somehow mod_wsgi still picks up python2.6 Next i tried, PATH=/usr/local/bin:$PATH export PATH then do a quick restart apache, but yet again its python2.6 !! Here is my $PATH /usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games contents of /etc/apache2/sites-available/wsgisite WSGIPythonHome /usr/local <VirtualHost *:80> ServerName wsgitest.local DocumentRoot /home/wwwhost/pydocs/wsgi <Directory /home/wwwhost/pydocs/wsgi> Order allow,deny Allow from all </Directory> WSGIScriptAlias / /home/wwwhost/pydocs/wsgi/app.wsgi </VirtualHost> app.wsgi import sys def application(environ, start_response): status = '200 OK' output = sys.version response_headers = [('Content-type', 'text/plain'), ('Content-Length', str(len(output)))] start_response(status, response_headers) return [output] Apache error.log 'import site' failed; use -v for traceback [Sun Jun 19 00:27:21 2011] [info] mod_wsgi (pid=23235): Initializing Python. [Sun Jun 19 00:27:21 2011] [notice] Apache/2.2.14 (Ubuntu) mod_wsgi/2.8 Python/2.6.5 configured -- resuming normal operations [Sun Jun 19 00:27:21 2011] [info] Server built: Nov 18 2010 21:20:56 [Sun Jun 19 00:27:21 2011] [info] mod_wsgi (pid=23238): Attach interpreter ''. [Sun Jun 19 00:27:21 2011] [info] mod_wsgi (pid=23239): Attach interpreter ''. [Sun Jun 19 00:27:31 2011] [info] mod_wsgi (pid=23238): Create interpreter 'wsgitest.local|'. [Sun Jun 19 00:27:31 2011] [info] [client 192.168.1.205] mod_wsgi (pid=23238, process='', application='wsgitest.local|'): Loading WSGI script '/home/wwwhost/pydocs/$ [Sun Jun 19 00:27:50 2011] [info] mod_wsgi (pid=23239): Create interpreter 'wsgitest.local|'. Has anybody ever managed to make mod_wsgi run on a non-system default version of python ?

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  • cd Command Linux and Mystery Flags

    - by Jason R. Mick
    Platform: CentOS 6.2 Shell:tcsh I'm playing around with cd for a BASH script, and noticed the wondrous cd - option, but was left with many questions... Why the cd -? Isn't this redundant with cd ..? EDIT [As FatalError points out, these two commands don't do the same things... so the answer is "no"] Can you delve farther back into your history with - flag, a la in a browser? e.g. When I type cd -, it takes me to my previous directory, but then if I enter that command again, it takes me to the directory I just came from, creating a sort of loop. Is a shorthand for going back multiple levels supported?EDITI realize I can go back with cd .., but was hoping this could be a gateway to a less verbose deep back, e.g. cd -3 vs. cd ../../../ ... hopefully that clarifies what I'm asking....EDIT2As to the current feedback, while .. is a special directory, I don't see a reason why the built-in cd to the terminal couldn't use a shorthand for ../../ ... ../ e.g. cd ..5 or why the built-in also couldn't have a history (a la auto pushd/popd) that could be turned on and used like cd -3. I get that this could be somewhat of security/privacy risk, but I don't see how it's any worst than storing a command history, which most shells/terminals do. The manpage for cd, accessible via man cd and help cd (it's the same for either command), only lists -L and -P flags. However when I type in cd --help it outputs Usage: cd [-plvn][-|<dir>].. Am I right in assuming the other flags and the - (back) option are nonstandard? What are the -n and -v flags for? Both seem to take me back to my home directory, that's all I've been able to figure out via experimentation. A quick read on web resources [1][2] offered just the same sort of info that the man page did and didn't answer my questions. Note: The second Linux-centric resource above claimed cd only had two options (obviously not true in current CentOS) hence my assumption that this functionality could be non-standard.

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  • turn off disable the performance cache

    - by jessie
    OK I run a streaming website and my CMS is giving me an error when uploading videos "Failed To Find Flength File" ok so I did some research. The answer I got from the coder was below. I did do all that, but the only thing I could not do is turn off what he refers to as performance cache, talked about in the last sentence... I am on a Cent OS Assuming the script is set up properly, you are probably dealing with some kind of write-caching. Some servers perform write-caching which prevents writing out the flength file or the entire CGITemp file during the upload. The flength file or the CGITemp file do not actually hit the disk until the upload is complete, making it worthless for reporting on progress during the upload. This may be fixed using a .htaccess file assuming your host supports them. Here is a link to an excellent tutorial on using .htaccess files. I strongly recommend giving it a quick read before attempting to install your own .htaccess file. 1. A mod_security module for Apache. To fix it just create a file called .htaccess (that's a period followed by "htaccess") and put the following lines in that file. Upload the file into the directory where the Uber-Uploader CGI ".pl" scripts resides, or in some directory above it (like your server's DOCUMENT_ROOT, i.e. the top-level of your webspace). htaccess files must be uploaded as ASCII mode, not BINARY. You may need to CHMOD the htaccess file to 644 or (RW-R--R--). # Turn off mod_security filtering. SecFilterEngine Off # The below probably isn't needed, # but better safe than sorry. SecFilterScanPOST Off If the above method does not work, try putting the following lines into the file SetEnvIfNoCase Content-Type \ "^multipart/form-data;" "MODSEC_NOPOSTBUFFERING=Do not buffer file uploads" mod_gzip_on No 2. "Performance Cache" enabled on OS X SERVER. If you're running OS X Server and the progress bar isn't working, it could be because of "performance caching." Apparently if ANY of your hosted sites are using performance caching, then by default, all sites (domains) will attempt to. The fix then is to disable the performance cache on all hosted sites.

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  • Issue using a "used" SSD as a Windows 8.1 Boot Drive

    - by EpiGrad
    So, I'm something of a Mac person, but decided to take a stab at this whole "build yourself a PC" thing - right now, the thing is assembled, posts just fine, and can get to the BIOS. The problem is the drive I want to use - I intended to use a 80 GB Corsair SSD I've had sitting around as the boot drive, and a new Samsung SSD for games and the like. So I boot using a Windows 8.1 install USB stick, and if the Samsung drive is plugged in, it happily offers to install Windows on it. The Corsair drive though, it's flipped out - I reformatted it as a blank NTFS drive (it was HFS for Mac purposes) and the BIOS can't see it, nor can the Windows installer. What's wrong, and how do I fix it? The tools at my disposal are: The current ASUS BIOS that came with my motherboard (a Z87I-Deluxe), a Mac running the latest OS X which can also boot to Windows 7 if needed via either Parallels or Bootcamp. Update 1: Update: Based on a friend's suggestion to switch SATA ports, Windows 8.1's installer can now see the drive as Drive 0, Partition 1, a 83.8 GB "Primary" partition. But when I click it and hit "Next", I get the following error: "We couldn't create a new partition or locate an existing one. For more information, see the Setup log files" - not that it gives any clue how to access those. Update 2: Following a trail of Google suggestions, I ended up going into advanced tools and just reformatting the drive as follows: Start DISKPART. Type LIST DISK and identify your SSD disk number (from 0 to n disks). Type SELECT DISK <n> where <n> is your SSD disk number. Type CLEAN Type CREATE PARTITION PRIMARY Type ACTIVE Type FORMAT FS=NTFS QUICK Type ASSIGN Type EXIT twice (one to get out of DiskPart, the other to exit the command line tool) Per these instructions. This goes well enough, but now I can select the disk for installation, and I get a new error: "Windows 8 cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GP disks." So, Googling that, I do the following: select disk 0 clean convert gpt exit ...and we might have fixed it. Windows is at least trying to install now.

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  • IE9 Error: There was a pr?blem sending the command to the program

    - by HK1
    I'm working on a new/fresh Windows 7 32bit machine that now has IE9 installed. The user is using the Dell Stardock application as his primary "desktop" (all his links there). When we place an internet link there and click on it we get the following error message: There was a problem sending the command to the program. To me this indicates that IE9 is having trouble going to the website we want to go to, which should get passed as a parameter to the browser when it opens. I don't think this is a StarDock/ObjectDock problem because we also have some other problems with internet links. For example, we cannot move an internet link from the Desktop to the Quick Launch on the task bar. When we do try, it forces us to put the link with the IE icon as part of the IE menu instead of allowing us to have a shortcut there as it's own entry. I should mention however, that links on the desktop and in the taskbar do work as we expect them too (without showing the above error message). It appears that this problem started after installing Windows Updates. Since we installed a whole bunch of updates at once I have no idea which one caused the problem. I did have Google Chrome installed but I uninstalled it since the user wants to use IE. The problem started before I uninstalled Chrome. I also reset the browser settings on IE9. It didn't help. Next I uninstalled IE9 which took me back to IE8. This actually did resolve the problem but the problem came back as soon as I installed IE9 again. We have Verizon Internet Security installed. It's actually a McAfee product rebranded to look like Verizon. I'm not real crazy over this software but the customer has a subscription so we're not planning to change it. I have no reason to believe that this is causing the problem and yet I know that security software is often to blame for strange issues. I've looked at the registry settings for the following keys and everything appears to be ok for every single one of them: HKEY_CLASSES_ROOT\.htm HKEY_CLASSES_ROOT\.html HKEY_CLASSES_ROOT\http\shell\open\command HKEY_CLASSES_ROOT\http\shell\open\ddeexec\Application HKEY_CLASSES_ROOT\https\shell\open\command HKEY_CLASSES_ROOT\https\shell\open\ddeexec\Application HKEY_CLASSES_ROOT\htmlfile\shell\open\command HKEY_CLASSES_ROOT\Microsoft.Website\Shell\Open\Command Edit1: I've found two potential solutions but I won't be able to try them until tomorrow. One is to disable the "Windows Font Cache" service. Another is to clear IE cache and browsing history. I won't be able to try out either solution until tomorrow since this is a remote client's machine. I see there are lots of other suggestions online but if you take the time to read them through you'll see that the other suggestions didn't fix the problem.

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  • Architectural advice - web camera remote access

    - by Alan Hollis
    I'm looking for architectural advice. I have a client who I've built a website for which essentially allows users to view their web cameras remotely. The current flow of data is as follows: User opens page to view web camera image. Javascript script polls url on server ( appended with unique timestamp ) every 1000ms Ftp connection is enabled for the cameras ftp user. Web camera opens ftp connection to server. Web camera begins taking photos. Web camera sends photo to ftp server. On image url request: Server reads latest image on hard drive uploaded via ftp for camera. Server deleted any older images from the server. This is working okay at the moment for a small amount of users/cameras ( about 10 users and around the same amount of cameras), but we're starting to worrying about the scalability of this approach. My original plan was instead of having the files read from the server, the web server would open up an ftp connection to the web server and read the latest images directly from there meaning we should have been able to scale horizontally fairly easily. But ftp connection establishment times were too slow ( mainly due to the fact that PHP out of the ox is unable to persist ftp connections ) and so we abandoned this approach and went straight for reading from the hard drive. The firmware provider for the cameras state they're able to build a http client which instead of using ftp to upload the image could post the image to a web server. This seems plausible enough to me, but I'm looking for some architectural advice. My current thought is a simple Nginx/PHP/Redis stack. Web camera issues post requests of latest image to Nginx/PHP and the latest image for that camera is stored in Redis. The clients can then pull the latest image from Redis which should be extremely quick as the images will always be stored in memory. The data flow would then become: User opens page to view web camera image. Javascript script polls url on server ( appended with unique timestamp ) every 1000ms Camera is sent an http request to start posting images to a provided url Web camera begins taking photos. Web camera sends post requests to server as fast as it can On image url request: Server reads latest image from redis Server tells redis to delete later image My questions are: Are there any greater overheads of transferring images via HTTP instead of FTP? Is there a simple way to calculate how many potential cameras we could have streaming at once? Is there any way to prevent potentially DOS'ing our own servers due to web camera requests? Is Redis a good solution to this problem? Should I abandon PHP/Ngix combination and go for something else? Is this proposed solution actually any good? Will adding HTTPs to the mix cause posting the image to become too slow? Thanks in advance Alan

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  • windows 7 virtual wireless adapter keeps going to sleep

    - by conners
    Just a quick question that I can't see mentioned anywhere online. I have a Windows 7 box configured like these guys recommend http://www.itgeekdiary.com/windows-7-as-an-wi-fi-access-point/ simply so that I can have my Windows 7 box as a wifi access point or a wifi emitter. It's also called a Microsoft Virtual WiFi Miniport Adapter. But it powers off and shuts down automatically and stops working. Basically everything works as intended and then - well -it will stopped working when I am not at the Windows 7 PC for a long time. The problem seems to be that every time my PC goes to "power save / sleep" and in the morning the Windows 7 machine "wakes" but blooming heck the wifi has stopped and you have to power cycle the PC (which is very uncool). When I power Cycle I have to do the following as administrator C:\Windows\System32\netsh.exe wlan start hostednetwork I then tried a gazllion things involving services and power management and eventually discovered that if I run the following commands as administrator it will be ok (for a bit) but every 3rd ot 4th time I try this "trick" it simply fails. the trick that seems to work 3 out of 4 times (i.e. "most" of the time) C:\Windows\System32\netsh.exe wlan stop hostednetwork C:\Windows\System32\netsh.exe wlan start hostednetwork But why does this only work "some" of the time? What else I did by myself: on every manage adapter properties (that relates to the wifi) I right clicked [configure] [power management] /disabled/ "allow the computer to power off to save power" <- this made no difference Also (and this is a bit annoying) there is no system tray app/GUI for the Microsoft Virtual WiFi Miniport Adapter output signal ... none... so (lame as it sounds) the ONLY way I can check if it's on is to physically go to another device and SCAN.. lame so my question can probably be solved by any of the following: a) can I stop Windows 7 sleeping this wifi when the machine sleeps b) can I force Windows to force wake this process on wake? if so how? c) what is the service / process REALLY called and how do I restart it if it crashes d) how can I flush the wifi properly rather power cycle the host machine e) anyone have a link to an program or app that can sit in the system tray that shows windows 7 wifi hotspot emission status (on/off/etc etc) Since I am a programmer I can easily write a vbs script / windows exe to fix this (and I will share this solution) and the gui problem if I can work out the actual service that is running that netsh stops/starts

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  • How To Configure Remote Desktop To Hyper-V Guest Virtual Machines

    - by Brian Jackett
    Configuring Remote Desktop (RDP) from a host Hyper-V machine to a guest virtual machine can be tricky, so this post is dedicated to the issues and resolution steps I went through to allow RDP.  Cutting to the point, below are the things to look for followed by some explanation about my scenario if you care to read.  This is not an exhaustive list of what is required, just the items that were causing problems for my particular scenario. Requirements Allow Remote Desktop Connections in guest OS. The network adapter type must allow communication with host machine (e.g. use an “Internal” virtual adapter.) If running Server 2008 R2 on guest, network discovery mode must be turned on. If running Server 2008 R2 on guest, the services supporting network discovery mode must be running: - DNS Client - Function Discovery Resource Publication - SSDP Discovery - UPnP Device Host My Environment     A quick word about my environment.  I am running Windows Server 2008 R2 with Hyper V on my laptop and numerous guest VMs running Windows Server 2003 R2 or Windows Server 2008 R2.  I run a domain controller VM and then 1 or 2 SharePoint servers depending on my work needs.  I’ve found this setup to work well except when it comes to the display window for my VMs. The Issue     Ever since I began running Hyper-V I haven’t been able to RDP to my guest VMs which means the resolution for my connection windows ha been limited to what the native Hyper-V connections allow.  During personal use I can put the resolution up to 1152 x 864, but during presentations I am usually limited to a measly 800 x 600.  That is until today when I decided to fully investigate why I couldn’t connect via RDP.     First a thank you to John Ross (@johnrossjr), Christina Wheeler (@cwheeler76) and Clayton Cobb (@warrtalon) for various suggestions while I was researching tonight.  As it turns out I had not 1, not 2, but 3 items preventing me from using RDP.  Let’s dig into the requirements above. Allow RDP Connection     This item I had previously taken care of, but it bears repeating because by default Windows Server 2008 R2 does not allow RDP connections.  Change the setting from “Don’t allow…” to whichever “Allow connections…” setting suits your needs.  I chose the less secure option as this is just my dev laptop. Network Adapter Type     When I originally configured my VMs I configured each to use 2 network adapters: one using the physical ethernet adapter for internet use and a virtual private adapter for communication between the VMs.  The connection for the ethernet adapter is an "”External” adapter and thus doesn’t connect between the host and guest.  The virtual private adapter allowed communication ONLY between the VMs and not to my host.  There is a third option “Internal” which allows communication between VMs as well as to the host.  After finding out this distinction I promptly created an Internal network adapter and assigned that to my VMs. Turn On Network Discovery     Seems like a pretty common sense thing, but in order to allow remote desktop connections the target computer must able to be found by the source computer (explained here.)  One of the settings that controls if a computer can be found on the network is aptly named Network Discovery.  By default Windows Server 2008 R2 turns Network Discovery off for security purposes.  To enable it open up the Network and Sharing Center.  Click “Change Advanced Sharing Settings” on the left.  On the following screen select “Turn on network discovery” for the currently used profile and click Save Settings.  You may notice though that your selection to turn on network discovery doesn’t save.  If this is the case then you most likely don’t have the supporting services running (as was my case.) Network Discovery Supporting Services     There are a total of 4 services (listed again below) that need to be running before you can turn on network discovery (explained here.)  The below images highlight these services.  In my guest VM I found that I had DNS Client already running while the other 3 were disabled.  I set them all to enabled and started the ones that were stopped.  After this change I returned to the Sharing settings screen and found that Network Discovery was turned on.  I’m not sure whether this was picking up my attempt to turn it on previously or if starting those services turned it on.  Either way the end result was a success. - DNS Client - Function Discovery Resource Publication - SSDP Discovery - UPnP Device Host Before and After Results     The first image is the smaller square shaped viewing window used by the Hyper-V native connection.  The second is the full-screen RDP connection in all its widescreen glory. Conclusion     Over the past few months I’ve found Hyper-V to be very useful for virtualizing my development environments, but I’ve also had a steep learning curve to get various items configured just right.  Allowing RDP connections to guest VMs was one area that I hadn’t been able to get right for the longest time.  Now that I resolved these issues I hope that others can avoid the pitfalls that I ran into.  If you know of any other items I left off feel free to let me know.        -Frog Out   Links Turning on Network Discovery http://sqlblog.com/blogs/john_paul_cook/archive/2009/08/15/remote-desktop-connection-on-windows-server-2008-r2.aspx Services required for Network Discovery http://social.technet.microsoft.com/Forums/en-US/winservergen/thread/2e1fea01-3f2b-4c46-a631-a8db34ed4f84

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  • Map a Network Drive from XP to Windows 7

    - by Mysticgeek
    We’ve received a lot of questions about mapping a drive from XP to Windows 7 to access data easily. Today we look at how to map a drive in Windows 7, and how to map to an XP drive from Windows 7. With the new Homegroup feature in Windows 7, it makes sharing data between computers a lot easier. But you might need to map a network drive so you can go directly into a folder to access its contents. Mapping a network drive may sound like “IT talk”, but the process is fairly easy. Map Network Drive in Windows 7 Note: All of the computers used in this article are part of the same workgroup on a home network. In this first example we’re mapping to another Windows 7 drive on the network. Open Computer and from the toolbar click on Map Network Drive. Alternately in Computer you can hit “Alt+T” to pull up the toolbar and click on Tools \ Map Network Drive. Now give it an available drive letter, type in the path or browse to the folder you want to map to. Check the box next to Reconnect at logon if you want it available after a reboot, and click Finish. If both machines aren’t part of the same Homegroup, you may be prompted to enter in a username and password. Make sure and check the box next to Remember my credentials if you don’t want to log in every time to access it. The drive will map and the contents of the folder will open up. When you look in Computer, you’ll see the drive under network location. This process works if you want to connect to a server drive as well. In this example we map to a Home Server drive. Map an XP Drive to Windows 7 There might be times when you need to map a drive on an XP machine on your network. There are extra steps you’ll need to take to make it work however. Here we take a look at the problem you’ll encounter when trying to map to an XP machine if things aren’t set up correctly. If you try to browse to your XP machine you’ll see a message that you don’t have permission. Or if you try to enter in the path directly, you’ll be prompted for a username and password, and the annoyance is, no matter what credentials you put in, you can’t connect. To solve the problem we need to set up the Windows 7 machine as a user on the XP machine and make them part of the Administrators group. Right-click My Computer and select Manage. Under Computer Management expand Local Users and Groups and click on the Users folder. Right-click an empty area and click New User. Add in the user credentials, uncheck User must change password at next logon, then check Password never expires then click Create. Now you see the new user you created in the list. After the user is added you might want to reboot before proceeding to the next step.   Next we need to make the user part of the Administrators group. So go back into Computer Management \ Local Users and Groups \ Groups then double click on Administrators. Click the Add button in Administrators Properties window. Enter in the new user you created and click OK. An easy way to do this is to enter the name of the user you created then click Check Names and the path will be entered in for you. Now you see the user as a member of the Administrators group. Back on the Windows 7 machine we’ll start the process of mapping a drive. Here we’re browsing to the XP Media Center Edition machine. Now we can enter in the user name and password we just created. If you only want to access specific shared folders on the XP machine you can browse to them. Or if you want to map to the entire drive, enter in the drive path where in this example it’s “\\XPMCE\C$” –Don’t forget the “$” sign after the local drive letter. Then login… Again the contents of the drive will open up for you to access. Here you can see we have two drives mapped. One to another Windows 7 machine on the network, and the other one to the XP computer.   If you ever want to disconnect a drive, just right-click on it and then Disconnect. There are several scenarios where you might want to map a drive in Windows 7 to access specific data. It takes a little bit of work but you can map to an XP drive from Windows 7 as well. This comes in handy where you have a network with different versions of Windows running on it. Similar Articles Productive Geek Tips Find Your Missing USB Drive on Windows XPMake Vista Index Your Network ConnectionsEasily Backup & Import Your Wireless Network Settings in Windows 7Quickly Open Network Connections List in Windows 7 or VistaHow To Find Drives Easily with Desk Drive TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Kill Processes Quickly with Process Assassin Need to Come Up with a Good Name? Try Wordoid StockFox puts a Lightweight Stock Ticker in your Statusbar Explore Google Public Data Visually The Ultimate Excel Cheatsheet Convert the Quick Launch Bar into a Super Application Launcher

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  • Guarding against CSRF Attacks in ASP.NET MVC2

    - by srkirkland
    Alongside XSS (Cross Site Scripting) and SQL Injection, Cross-site Request Forgery (CSRF) attacks represent the three most common and dangerous vulnerabilities to common web applications today. CSRF attacks are probably the least well known but they are relatively easy to exploit and extremely and increasingly dangerous. For more information on CSRF attacks, see these posts by Phil Haack and Steve Sanderson. The recognized solution for preventing CSRF attacks is to put a user-specific token as a hidden field inside your forms, then check that the right value was submitted. It's best to use a random value which you’ve stored in the visitor’s Session collection or into a Cookie (so an attacker can't guess the value). ASP.NET MVC to the rescue ASP.NET MVC provides an HTMLHelper called AntiForgeryToken(). When you call <%= Html.AntiForgeryToken() %> in a form on your page you will get a hidden input and a Cookie with a random string assigned. Next, on your target Action you need to include [ValidateAntiForgeryToken], which handles the verification that the correct token was supplied. Good, but we can do better Using the AntiForgeryToken is actually quite an elegant solution, but adding [ValidateAntiForgeryToken] on all of your POST methods is not very DRY, and worse can be easily forgotten. Let's see if we can make this easier on the program but moving from an "Opt-In" model of protection to an "Opt-Out" model. Using AntiForgeryToken by default In order to mandate the use of the AntiForgeryToken, we're going to create an ActionFilterAttribute which will do the anti-forgery validation on every POST request. First, we need to create a way to Opt-Out of this behavior, so let's create a quick action filter called BypassAntiForgeryToken: [AttributeUsage(AttributeTargets.Method, AllowMultiple=false)] public class BypassAntiForgeryTokenAttribute : ActionFilterAttribute { } Now we are ready to implement the main action filter which will force anti forgery validation on all post actions within any class it is defined on: [AttributeUsage(AttributeTargets.Class, AllowMultiple = false)] public class UseAntiForgeryTokenOnPostByDefault : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { if (ShouldValidateAntiForgeryTokenManually(filterContext)) { var authorizationContext = new AuthorizationContext(filterContext.Controller.ControllerContext);   //Use the authorization of the anti forgery token, //which can't be inhereted from because it is sealed new ValidateAntiForgeryTokenAttribute().OnAuthorization(authorizationContext); }   base.OnActionExecuting(filterContext); }   /// <summary> /// We should validate the anti forgery token manually if the following criteria are met: /// 1. The http method must be POST /// 2. There is not an existing [ValidateAntiForgeryToken] attribute on the action /// 3. There is no [BypassAntiForgeryToken] attribute on the action /// </summary> private static bool ShouldValidateAntiForgeryTokenManually(ActionExecutingContext filterContext) { var httpMethod = filterContext.HttpContext.Request.HttpMethod;   //1. The http method must be POST if (httpMethod != "POST") return false;   // 2. There is not an existing anti forgery token attribute on the action var antiForgeryAttributes = filterContext.ActionDescriptor.GetCustomAttributes(typeof(ValidateAntiForgeryTokenAttribute), false);   if (antiForgeryAttributes.Length > 0) return false;   // 3. There is no [BypassAntiForgeryToken] attribute on the action var ignoreAntiForgeryAttributes = filterContext.ActionDescriptor.GetCustomAttributes(typeof(BypassAntiForgeryTokenAttribute), false);   if (ignoreAntiForgeryAttributes.Length > 0) return false;   return true; } } The code above is pretty straight forward -- first we check to make sure this is a POST request, then we make sure there aren't any overriding *AntiForgeryTokenAttributes on the action being executed. If we have a candidate then we call the ValidateAntiForgeryTokenAttribute class directly and execute OnAuthorization() on the current authorization context. Now on our base controller, you could use this new attribute to start protecting your site from CSRF vulnerabilities. [UseAntiForgeryTokenOnPostByDefault] public class ApplicationController : System.Web.Mvc.Controller { }   //Then for all of your controllers public class HomeController : ApplicationController {} What we accomplished If your base controller has the new default anti-forgery token attribute on it, when you don't use <%= Html.AntiForgeryToken() %> in a form (or of course when an attacker doesn't supply one), the POST action will throw the descriptive error message "A required anti-forgery token was not supplied or was invalid". Attack foiled! In summary, I think having an anti-CSRF policy by default is an effective way to protect your websites, and it turns out it is pretty easy to accomplish as well. Enjoy!

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  • Blending the Sketchflow Action

    - by GeekAgilistMercenary
    Started a new Sketchflow Prototype in Expression Blend recently and documented each of the steps.  This blog entry covers some of those steps, which are the basic elements of any prototype.  I will have more information regarding design, prototype creation, and the process of the initial phases for development in the future.  For now, I hope you enjoy this short walk through.  Also, be sure to check out my last quick entry on Sketchflow. I started off with a Sketchflow Project, just like I did in my previous entry (more specifics in that entry about how to manipulate and build out the Sketchflow Map). Once I created the project I setup the following Sketchflow Map. The CoreNavigation is a ComponentScreen setup solely for the page navigation at the top of the screen.  The XAML markup in case you want to create a Component Screen with the same design is included below. <UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" xmlns:pb="clr-namespace:Microsoft.Expression.Prototyping.Behavior;assembly=Microsoft.Expression.Prototyping.Interactivity" x:Class="RapidPrototypeSketchScreens.CoreNavigation" d:DesignWidth="624" d:DesignHeight="49" Height="49" Width="624">   <Grid x:Name="LayoutRoot"> <TextBlock HorizontalAlignment="Stretch" Margin="307,3,0,0" Style="{StaticResource TitleCenter-Sketch}" Text="Aütøchart Scorecards" TextWrapping="Wrap"> <i:Interaction.Triggers> <i:EventTrigger EventName="MouseLeftButtonDown"> <pb:NavigateToScreenAction TargetScreen="RapidPrototypeSketchScreens.Screen_1"/> </i:EventTrigger> </i:Interaction.Triggers> </TextBlock> <Button HorizontalAlignment="Left" Margin="164,8,0,11" Style="{StaticResource Button-Sketch}" Width="144" Content="Scorecard"> <i:Interaction.Triggers> <i:EventTrigger EventName="Click"> <pb:NavigateToScreenAction TargetScreen="RapidPrototypeSketchScreens.Screen_1_2"/> </i:EventTrigger> </i:Interaction.Triggers> </Button> <Button HorizontalAlignment="Left" Margin="8,8,0,11" Style="{StaticResource Button-Sketch}" Width="152" Content="Standard Reports"> <i:Interaction.Triggers> <i:EventTrigger EventName="Click"> <pb:NavigateToScreenAction TargetScreen="RapidPrototypeSketchScreens.Screen_1_1"/> </i:EventTrigger> </i:Interaction.Triggers> </Button> </Grid> </UserControl> Now that the CoreNavigation Component Screen is done I built out each of the others.  In each of those screens I included the CoreNavigation Screen (all those little green lines in the image) as the top navigation.  In order to do that, as I created each of the pages I would hover over the CoreNavigation Object in the Sketchflow Map.  When the utilities drawer (the small menu that pops down under a node when you hover over it) shows click on the third little icon and drag it onto the page node you want a navigation screen on. Once I created all the screens I setup the navigation by opening up each screen and right clicking on the objects that needed to point to somewhere else in the prototype. Once I was done with the main page, my Home Navigation Page, it looked something like this in the Expression Blend Designer. I fleshed out each of the additional screens.  Once I was done I wanted to try out the deployment package.  The way to deploy a Sketchflow Prototype is to merely click on File –> Package SketchFlow Project and a prompt will appear.  In the prompt enter what you want the package to be called. I like to see the files generated afterwards too, so I checked the box to see that.  When Expression Blend is done generating everything you’ll have a directory like the one shown below, with all the needed files for deployment. Now these files can be copied or moved to any location for viewing.  One can even copy them (such as via FTP) to a server location to share with others.  Once they are deployed and you run the "TestPage.html" the other features of the Sketchflow Package are available. In the image below I have tagged a few sections to show the Sketchflow Player Features.  To the top left is the navigation, which provides a clearly defined area of movement in a list.  To the center right is the actual prototype application.  I have placed lists of things and made edits.  On the left hand side is the highlight feature, which is available in the Feedback section of the lower left.  On the right hand list I underlined the Autochart with an orange marker, and marked out two list items with a red marker. In the lower left hand side in the Feedback section is also an area to type in your feedback.  This can be useful for time based feedback, when you post this somewhere and want people to provide subsequent follow up feedback. Overall lots of great features, that enable some fairly rapid prototyping with customers.  Once one is familiar with the steps and parts of this Sketchflow Prototype Capabilities it is easy to step through an application without even stopping.  It really is that easy.  So get hold of Expression Blend 3 and get ramped up on Sketchflow, it will pay off in the design phases to do so! Original Entry

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  • Geek Fun: Virtualized Old School Windows – Windows 95

    - by Matthew Guay
    Last week we enjoyed looking at Windows 3.1 running in VMware Player on Windows 7.  Today, let’s upgrade our 3.1 to 95, and get a look at how most of us remember Windows from the 90’s. In this demo, we’re running the first release of Windows 95 (version 4.00.950) in VMware Player 3.0 running on Windows 7 x64.  For fun, we ran the 95 upgrade on the 3.1 virtual machine we built last week. Windows 95 So let’s get started.  Here’s the first setup screen.  For the record, Windows 95 installed in about 15 minutes or less in VMware in our test. Strangely, Windows 95 offered several installation choices.  They actually let you choose what extra parts of Windows to install if you wished.  Oh, and who wants to run Windows 95 on your “Portable Computer”?  Most smartphones today are more powerful than the “portable computers” of 95. Your productivity may vastly increase if you run Windows 95.  Anyone want to switch? No, I don’t want to restart … I want to use my computer! Welcome to Windows 95!  Hey, did you know you can launch programs from the Start button? Our quick spin around Windows 95 reminded us why Windows got such a bad reputation in the ‘90’s for being unstable.  We didn’t even get our test copy fully booted after installation before we saw our first error screen.  Windows in space … was that the most popular screensaver in Windows 95, or was it just me? Hello Windows 3.1!  The UI was still outdated in some spots.   Ah, yes, Media Player before it got 101 features to compete with iTunes. But, you couldn’t even play CDs in Media Player.  Actually, CD player was one program I used almost daily in Windows 95 back in the day. Want some new programs?  This help file about new programs designed for Windows 95 lists a lot of outdated names in tech.    And, you really may want some programs.  The first edition of Windows 95 didn’t even ship with Internet Explorer.   We’ve still got Minesweeper, though! My Computer had really limited functionality, and by default opened everything in a new window.  Double click on C:, and it opens in a new window.  Ugh. But Explorer is a bit more like more modern versions. Hey, look, Start menu search!  If only it found the files you were looking for… Now I’m feeling old … this shutdown screen brought back so many memories … of shutdowns that wouldn’t shut down! But, you still have to turn off your computer.  I wonder how many old monitors had these words burned into them? So there’s yet another trip down Windows memory lane.  Most of us can remember using Windows 95, so let us know your favorite (or worst) memory of it!  At least we can all be thankful for our modern computers and operating systems today, right?  Similar Articles Productive Geek Tips Geek Fun: Remember the Old-School SkiFree Game?Geek Fun: Virtualized old school Windows 3.11Stupid Geek Tricks: Tile or Cascade Multiple Windows in Windows 7Stupid Geek Tricks: Select Multiple Windows on the TaskbarHow to Delete a System File in Windows 7 or Vista TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Enable Check Box Selection in Windows 7 OnlineOCR – Free OCR Service Betting on the Blind Side, a Vanity Fair article 30 Minimal Logo Designs that Say More with Less LEGO Digital Designer – Free Create a Personal Website Quickly using Flavors.me

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