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• Trying to find books

  - by robblot

  When I was learning Visual Basic.net 2008 I found a book that not only taught the basics but by the end of the book I had developed a fully working database application. Does anyone know where I might find a simular book but using Visual C++?

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• Windows 2003 :: Performance Monitoring :: Simple/Stupid Tutorial

  - by BSI Support

  I have a half dozen front-end servers all running IIS 6.0-based/hosted applications. (primary .NET 2.0 web apps.) Basically, I'd like to take some basic performance data from each one, through such into a spreadsheet, and compare. CPU load, RAM load, whatever... If anyone can point out a very simple/stupid "here's how you do that" type of tutorial, that would be wonderful.

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• raid 6 vs raid 10? which would you choose.

  - by dasko

  my choice would be raid 6 for a file server since you can lose two drives and it does not matter which set of two can die. from what i understand with raid 10 you can lose two drives but if they happen to be off the same raid 1 then you are a out of luck? any suggestions? basic file server with about 200gb of data and it would act as a single point of backup for other workstations and servers. thanks in advance.

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• Mac OS X Photo Tool: Cropping w/ particular aspect ratio

  - by Jason S

  I'm spoiled by FastStone on the PC. I'm looking for decent freeware/shareware for Mac OS X that will allow basic photo editing, particularly something that lets me pick a crop size or aspect ratio by entering in numbers rather than just a freehand crop (I need to make sure it's 8.5"x11" aspect ratio). Any suggestions?

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• how to check open ports of bunch of website at once with nmap/linux?

  - by austin powers

  hi , I want to use nmap in such a way that I could check bunch of server's port at once for checking whether their particular port is open or not? right now I have 10 ip addresses but in future this could be more . I know the very basic command in linux like cat/nano/piping but I don't know how can I feed to nmap the list of my servers to open them one by one and return the result.

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• hosts.deny not working

  - by Captain Planet

  Currently I am watching the live auth.log and someone is continuously trying the brute force attack for 10 hours. Its my local server so no need to worry but I want to test. I have installed denyhosts. There is already an entry for that IP address in hosts.deny. But still he is trying the attacks from same IP. System is not blocking that. Firstly I don't know how did that IP address get entered in that file. I didn't enter it, is there any other system script which can do that. hosts.deny is sshd: 120.195.108.22 sshd: 95.130.12.64 hosts.allow ALL:ALL sshd: ALL Is there any iptable setting that can override the host.deny file

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• How to configure JAAS on JBoss?

  - by AntonioP

  Hey Im having a problem with "Failed to load users/passwords/role files: java.io.IOException: No properties file: users.properties or defaults: defaultUsers.properties found" error from jboss. No matter what I change in conf/login-config.xml always that same error. Turning on TRACE for org.jboss.security shows that it does Security domain: myapp followed by findResource: null and the above error. Ive tryed adding a users.properties to my .war WEB-INF/classes/users.properties to no avail. Why is jBoss doing like this? What is this JAAS and why does it need it? What does it require, where to put what files, if its possible Ill remove all of this org.jboss.security.auth.spi.UsersRolesLoginModule completly, just let me use my app. Thanks

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• Deny users in a certain group access to dovecot

  - by celil

  I installed the dovecot-imapd package in Ubuntu, and my setup is as follows: $ sudo dovecot -n # 1.2.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-27-generic-pae i686 Ubuntu 10.04.1 LTS log_timestamp: %Y-%m-%d %H:%M:%S protocols: imaps login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-login mail_privileged_group: mail mail_location: maildir:~/Maildir mbox_write_locks: fcntl dotlock auth default: passdb: driver: pam userdb: driver: passwd For security reasons I would like to deny all users that are in the admin group ability to do imap login via dovecot. This is done in order to prevent a brute force attacker from discovering the admin passwords, and obtaining administrator privileges on the system. How can this be achieved? Presumably, I will have to modify some settings in /etc/dovecot/dovecot.conf, but I am hesitant to change the default settings lest I create other security vulnerabilities.

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• Testing php mail() in localhost problem

  - by Samir Ghobril

  Hey guys, recently I just installed msmtp in linux and I even send a mail from the terminal and it worked: echo -e "Subject: Test Mail\r\n\r\nThis is a test mail" |msmtp --debug --from=default -t [email protected] But in php, after editing the php.ini file to have this: sendmail_path = '/usr/bin/msmtp -t' and using this piece of code: <?php if ( mail ( '[email protected]', 'Test mail from localhost', 'Working Fine.' ) ){ echo 'Mail sent'; } else{ echo 'Error. Please check error log.'; } ?> I get the Mail sent message but don't receive a message in my inbox. Not even in the spam folder. Anything wrong I'm doing? msmtp configuration file: defaults tls on tls_starttls on tls_trust_file /etc/ssl/certs/ca-certificates.crt account default host smtp.gmail.com port 587 auth on user [email protected] password password from [email protected] logfile /var/log/msmtp.log

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• How to compare mp3, flac audio data in a file, ignoring header data (ID3 tag) etc.?

  - by Rob

  I've backed up some audio files up in 2 places and added ID3 tags into one backup but not the other, since time has passed my own memory has faded on whether the backups are actually the same, but now one has ID3 data and the other doesn't, basic binary compare will fail and inspection will be cumbersome. Is there a tool to compare just the audio data (not the header, ID3) in mp3s, flac files, and other files using header data such as ID3. started a thread on beyond compare here: http://www.scootersoftware.com/vbulletin/showthread.php?t=7413 would consider other comparison software that does this task

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• Local Apache on Windows XP not finishing page requests

  - by asgeo1

  I have Apache 2.2.11 installed locally on my Windows XP (SP3) dev machine, which I setup about 3 months ago. I have just started having a strange problem in the last few week. Apache is serving some basic PHP applications like phpMyAdmin. When I make a page request, Apache appears to not finish serving all resources for that page. Firefox shows the "Transferring data from servername..." message, and the page never completes. The same problem happens in Internet Explorer too. I can sometimes tell which resource it is waiting on, because most of the page will render except for some image or similar resources. (Not sure why Firebug doesn't show this) It doesn't have the problem every page request - for page requests where most of the resources are cached in my browser, the page request will work with no problems. Or pages that are very light will work with no problems. However, if I "hard" refresh the page, I will have this problem (probably because it is requesting all page resources) Does anyone know what this could be? It is so strange that it has only just started happening - and I did not make any changes to my system (that I am aware of) I tried playing with the Apache ThreadsPerChild setting, but it did not seem to make a difference. UPDATE: I have been doing some more tests. I have been serving the most basic of pages, just a plain HTML file: <html> <body> <h1>testing</h1> </body> </html> If I request this page multiple times in a row, AND each request occurs immediately after the previous has completed, then 50% of the time the request will time out. However, if I put a 1-2 second gap between requests, then there is no problem. This correlates to what I have observed when the brower requests a real application page. When the browser has nothing cached, then all of the page resources are requested from the browser in a short amount of time - this appears to trigger the problem. UPDATE2: Nathan Long has helped me understand the issue a little better with the server-status page (see below). It is weird, it is like the server has a hickup sending data to the client. The client sits there waiting forever for data that never arrives. Closing the client process does not terminate the connection on the server - the server still has active threads for each previously attempted connection, but they just sit there - not sending any data and never terminating. (even though the client is now closed) Only a restart of the server seems to terminate them.

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• Advantages of Re-Compiling of Linux Kernels: Share your Ideas

  - by krishnanunni

  hello open xperts can you give me some advantages of Recompilation of New Linux Kernel and Installations. make xconfig modules modules_install install this is what i`m talking on. can someone provide me the basic needs and Advantages?.. Thanks for helping me

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• Why does CPU processing time matter when compared to real wall clock time?

  - by PeanutsMonkey

  I am running the command time 7zr a -mx=9 sample.7z sample.log to gauge how long it takes to compress a file larger than 1GB. The results I get are as follows. real 10m40.156s user 17m38.862s sys 0m5.944s I have a basic understanding of the difference but don't understand how this plays a role in the time in takes to compress the file. For example should I be looking at real or user + sys?

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• Windows 2008 IIS 7.0 HTTP to HTTPS Redirect -- Versus IIS 6.0 Mechanism

  - by Dan7el

  This topic, creating a mechanism for redirection from HTTP to HTTPS on a Windows 2008 server running IIS 7.0 is a much written-about topic on the Internet. How this is done is really not so much my issue. My issue is more of explaining why this can't be done with the standard HTTP Redirect module that ships with Windows 2008 IIS 7.0. Instead, there are other methods needed that are more arduous. First, the IIS 6.0 method requires no externally available modules nor does it require any additional modifications to the web.config or any type of other development effort. It's outlined here: http://blogs.microsoft.co.il/blogs/dorr/archive/2009/01/13/how-to-force-redirection-from-http-to-https-on-iis-6-0.aspx And, you can see the basic steps are to run the snap-in, get the properties on the site, and do some modifications. Presto, you have the HTTP -- HTTP redirect setup. Now, on the IIS 7.0 platform, it doesn't seem this simple. An initial search found the following site: http://www.sslshopper.com/iis7-redirect-http-to-https.html Which has two separate approcates: 1. Involves installing a separately available Microsoft module -- URL Rewrite Module, and then adding XML to the web.config. 2. Custom Error Page. ...there might be other methods, but these are the basic ones and the first is listed as the primary method. But wait...There exists on the IIS 7.0 an HTTP Redirect Module. So...why can't I use the HTTP Redirect Module to do this very thing? This is really my big question. I need to know this because my management is going to insist I use the HTTP Redirect Module and set up the HTTP to HTTPS redirect in a similar fashion to how we do in IIS 6.0. Can someone please explain to me, in clean, simple, easy to understand, terms that both I and my management can understand as to why I need to go get the URL Rewrite Module and install that on the server and make the web.config changes suggested by the article instead of simply using the HTTP Redirect module that's already installed on the site? Thanks a bunch.

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• Why does cifs asks for su rights to write any data into it?

  - by Denys S.

  I'm mounting a windows share as follows: sudo mount -t cifs //192.168.178.49/public -o users,username=name,dom=domain,password=pword /mnt/nas Then I'm trying to create a simple file with some basic text: touch /mnt/nas/me.txt And get an error, however, the file is created (contains 0B of data though): touch: cannot touch ‘me.txt’: Permission denied With sudo it works flawless. How can I allow my current user to write data to the share? Is there a mount option?

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• Can't login to SQL Server after moving machine to different office/domain

  - by Dan

  Our company has just been bought and the over the weekend I have brought up the last few machines to plug into their network (they are under a different Windows Domain). The last machine is our Vault system and the SQL Server was using Windows Authentication. I have plugged it into their network and its working fine, but i cannot connect to SQL Server with Management Studio and, I fear, no backup jobs will also be working. When I try to login under Windows Auth, it has the user name of "NEWDOMAIN\Administrator" (greyed out) and then presents a "login failed" message with error code "18456". Can anyone help me with this, or will I just have to reinstall SQL Server, Vault and restore the backup I took before the move?

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• Is Tripp Lite a trusted brand for a UPS?

  - by David

  I am looking to buy a rack mounted UPS that can take in 208V power and serve up 120V power. A basic APC unit that can do this is $4k. I have found a Tripp Lite model that will work for $2.5k. Is the extra $1.5k for the APC just for the brand? Or will the Tripp Lite serve me just as well? Thanks!

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• Added autossh in rc.local, but the dynamic port forwarding won't work

  - by rankjie

  I am using Rasbian on my newly arrived Rasp.Pi, and decided to make it my own proxy server. Now I need to set up a ssh tunnel on the Pi to my Linode server, and make it auto start with the system. What did I do: Add this line to /etc/rc.local autossh -f theRemoteServer -N -D 5555 -L 1234:localhost:22 After I reboot, I found out that I can't use the localhost:5555 as a socks proxy. So I type the command ps -A | grep ssh then I can see the autossh and ssh all running: pi@raspberrypi ~ $ ps -A | grep ssh 2018 ? 00:00:00 sshd 2116 ? 00:00:00 autossh 2119 ? 00:00:00 sshd 2195 ? 00:00:00 sshd 3173 ? 00:00:00 ssh (I've installed autossh, and the command works if I type it manually.) (I use the passwordless key auth, so I don't have to enter password.) Much appreciated and sorry for my poor English.

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• Why does iChat Server keep connecting to proxy.eu.jabber.org?

  - by Tom Hamming

  I have OS X Server 10.6.5 running on a new Mac Mini (server model), serving several functions among which is iChat Server (iChat and Pidgin on Windows as clients). In the iChat log in Server Admin, I kept seeing entries about connecting to proxy.eu.jabber.org. It's for our office network and I wasn't excited about external access to it, so I disabled server-to-server XMPP federation and now the connections just time out. But why is it doing that in the first place? Sample log entry: (datetime) (servername)jabberd/resolver[portnum]: [xmpp-server._tcp.proxy.eu.jabber.org resolved to 208.68.163.220:5269 (300 seconds to live) then: sending dialback auth request for route '(full server hostname)/proxy.eu.jabber.org' A couple minutes later, it comes back with: dialback for outgoing route '(full server hostname)/proxy.eu.jabber.org' timed out

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• Where can I find logs for SFTP?

  - by Jake

  I'm trying to set up sftp-server but the client is getting an error, Connection closed by server with exitcode 1 /var/log/auth.log (below) doesn't help much, how can I find out what the error is? I'm running Ubuntu 10.04.1 LTS sshd[27236]: Accepted password for theuser from (my ip) port 13547 ssh2 sshd[27236]: pam_unix(sshd:session): session opened for user theuser by (uid=0) sshd[27300]: subsystem request for sftp sshd[27236]: pam_unix(sshd:session): session closed for user theuser Update: I've been prodding this for a while now, I've got the sftp command on another server giving me a more useful error. Request for subsystem 'sftp' failed on channel 0 Couldn't read packet: Connection reset by peer Everything I've found on the net suggests this id a problem with sftp-server but when I remove the chroot from sshd config I can access the system. I assume this means sftp-server is accessible and set up correctly.

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• What is the default mount point on Linux systems (all)?

  - by Vijay Sharma

  My question is very basic in nature. Is the mount point for external media (like USB) always /media? Because in a Debian system, if I plug in any USB device that goes to the /media folder. So is it the case with all the other Linux flavors like Fedora, Ubuntu, etc. If a USB device is automatically mounted will it always go to the /media directory?

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• MediaWiki alternatives for small business?

  - by Jakobud

  Are there any good alternative wiki's to MediaWiki out there for a small business? Mostly we are just wanting to use it for documentation. MediaWiki is a fine (and slightly outdated) piece of software, but it doesn't even officially support basic things like controlling who has access to what page/article, which is an important feature for us.

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• Source of Unexplained Requests in Server Logs

  - by Synetech inc.

  Hi, I am baffled by some entries in my server logs, specifically the web-server logs. Other than normal, expected traffic, I have noticed three types of request errors (eg 404, etc.): Broken links, ie links from old, external pages that point to pages that are no longer here Sequences of probes, ie some jerk trying to hack in by scanning my server for a series of exploitable admin type pages and such What appear to be completely random requests for things that have never existed on the server or even have anything to do with the server, and appear by themselves (ie not a series of requests like the probes) Could it somehow be a mistyped URL or IP? That’s about the only thing that I can think of, but still, how could I get a request on say, foobar.dyndns.org (12.34.56.78) for something like www.wantsfly.com/prx2.php or /MNG/LIVE or http://ant.dsabuse.com/abc.php?auth=45V456b09m&strPassword=X%5BMTR__CBZ%40VA&nLoginId=43. (Those are a few actual requests from my logs.) Can someone please explain scenario three to me? Thanks.

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• Why does iChat Server keep connecting to proxy.eu.jabber.org?

  - by Tom Hamming

  I have OS X Server 10.6.5 running on a new Mac Mini (server model), serving several functions among which is iChat Server (iChat and Pidgin on Windows as clients). In the iChat log in Server Admin, I kept seeing entries about connecting to proxy.eu.jabber.org. It's for our office network and I wasn't excited about external access to it, so I disabled server-to-server XMPP federation and now the connections just time out. But why is it doing that in the first place? Sample log entry: (datetime) (servername)jabberd/resolver[portnum]: [xmpp-server._tcp.proxy.eu.jabber.org resolved to 208.68.163.220:5269 (300 seconds to live) then: sending dialback auth request for route '(full server hostname)/proxy.eu.jabber.org' A couple minutes later, it comes back with: dialback for outgoing route '(full server hostname)/proxy.eu.jabber.org' timed out

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• How to establish SIP connection, when SIP-proxy is required?

  - by LA_

  I have Asterisk/1.8.13.1 Asterisk GUI-version : SVN--r Yes, quite old one, but I can not update it since this is installed on my Synology NAS. NAS is connected to internet thru router Asus RT-N16. I should use the following data to connect to the server: Auth name – 7499952XXXX User name/User ID/Display Name – nickname Authorization user name - [email protected] Domain - sip.beeline.ru SIP proxy server - msk.sip.beeline.ru I've also found the following string: [email protected]:password:[email protected]@msk.sip.beeline.ru:5060/7499952XXXX I've tested the parameters on my PC thru X-Lite and it works well (so, assume there is no any problem with the router, no need to do anything with router's NAS settings). But since I am quite new to Asterisk, I can not understand where to input all these data. Asterisk GUI doesn't have fields for proxy: Can somebody please help me with step-by-step instruction? Thank you in advance!

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