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• Why database partitioning didn't work? Extract from thedailywtf.com

  - by questzen

  Original link. http://thedailywtf.com/Articles/The-Certified-DBA.aspx. Article summary: The DBA suggests an approach involving rigorous partitioning, 10 partitions per disk (3 actual disks and 3 raid). The stats show that the performance is non-optimal. Then the DBA suggests an alternative of 1 partition per disk (with more added disks). This also fails. The sys-admin then sets up a single disk, single partition and saves the day. The size of disks was not mentioned but given today,s typical disk sizes (of the order of 100 GB), the partitions ; would be huge, it surprises me that a single disk with all partitions outperformed. Initially I suspect that the data was segregated and hence faster reads. But how come the performance didn't degrade as time went by with all the inserts and updates happening? Saw this on reddit, but the explanation was by far spindle/platter centered. There was no mention in the article about this. Is there any other reason? I can only guess that the tables were using a incorrect hash distribution causing non-uniform allocation across disks (wrong partitioning); this would increase fetch times. Any thoughts?

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• Low-profile, PCI Express, x1 video card with VGA-out?

  - by Dandy

  I just bought an Acer Aspire EasyStore H340 system (http://us.acer.com/acer/productv.do?LanguageISOCtxParam=en&kcond61e.c2att101=54825&sp=page16e&ctx2.c2att1=25&link=ln438e&CountryISOCtxParam=US&ctx1g.c2att92=450&ctx1.att21k=1&CRC=936243954) It comes with Windows Home Server, which I don't particularly care for (too dumbed down for my liking)--I bought the box mainly for the form factor, and intend to install Server 2008 on it and have it run as a small domain controller. The geniuses at Acer however went out of their way to ensure you can only run Home Server--you can only connect to it via the Home Server Connector software, as it has no video-out whatsoever (so essentially, there's no way to even get into the BIOS). It only has a low-profile, PCI Express x1 slot. It turns out to be way harder than I thought to locate a video card that both has an x1 connector, and is low-profile (I'd really rather not snip the bracket at the back just so it'll fit the case). I know they're out there, and I've seen one with Display Port outputs, but I don't have a monitor with this connection. So to reiterate, it needs to be: - x1 connector - low profile - VGA out (though DVI would be okay; I have some spare adapters) Can anyone recommend anything at all?

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• Debian Wheezy IPv6 isn't configured with ifup post-up hook

  - by aef

  We recently set up a server on Debian Wheezy Beta 3 (x86_64) which has a native IPv6 connection. We configured the eth0 interface to get the IPv6 configuration through some post-up hook commands in /etc/network/interfaces. The result is, that after the booting the system up, there is only IPv4 and an auto-configured link-local IPv6 address configured on the interface, as if the command has never been executed. When we additionally place the commands after the call to ifup -a inside the /etc/init.d/networking init script, everything works as expected and we have a fully configured interface after booting up. This is quite an ugly way to configure the interface. What are we doing wrong with the ifup post-up hooks? Or is this a bug? The section from /etc/network/interfaces looks like this (IP-addresses changed): allow-hotplug eth0 iface eth0 inet static address 1.2.3.1 netmask 255.255.255.192 network 1.2.3.0 broadcast 1.2.3.63 gateway 1.2.3.62 dns-nameservers 8.8.8.8 dns-search mydomain.tld post-up ip -6 addr add 2001:db8:100:3022::2 dev eth0 post-up ip -6 route add fe80::1 dev eth0 post-up ip -6 route add default via fe80::1 dev eth0 I also tried it in this alternative way: auto eth0 iface eth0 inet static address 1.2.3.1 netmask 255.255.255.192 network 1.2.3.0 broadcast 1.2.3.63 gateway 1.2.3.62 dns-nameservers 8.8.8.8 dns-search mydomain.tld iface eth0 inet6 static address 2001:db8:100:3022::2 netmask 64 gateway fe80::1 What we added to /etc/init.d/networking: … case "$1" in start) process_options check_ifstate if [ "$CONFIGURE_INTERFACES" = no ] then log_action_msg "Not configuring network interfaces, see /etc/default/networking" exit 0 fi set -f exclusions=$(process_exclusions) log_action_begin_msg "Configuring network interfaces" if ifup -a $exclusions $verbose && ifup_hotplug $exclusions $verbose # Our additions ip -6 addr add 2001:db8:100:3022::2 dev eth0 ip -6 route add fe80::1 dev eth0 ip -6 route add default via fe80::1 dev eth0 then log_action_end_msg $? else log_action_end_msg $? fi ;; …

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• Steps to deploy a custom routing protocol

  - by user134589

  I'm a Ph.D Student and I'm researching a Service Centric Networking architecture with resourceallocation on a large scale. What I'm looking to do is expand an existing routing protocol like OSPF with extra fields and some new message types that I need for communication between Nodes. I want to manipulate the cost of a network link and I want paths to be calculated like in OSPF V2/v3, but using the cost that my algorithms have calculated. What I have I have the source code of OSPF from Quagga. I am assuming I can edit this code how I want, including packet structures and creating new types. Yes, I am aware it won't be easy but this is a 6 years research project and I am eager to develop something new, to move forward. What I need I would like to know how I can deploy the edited OSPF source files I have (written in C) on any type of server. I have a large testbed environment available with hundreds of virtual nodes and pretty much any OS out there. So if I want to test my extended protocol, how do I make all the nodes in a network use this to communicate? I do not understand what parts of the kernel I need to edit here. I tried searching for days now and I am unable to find how to deploy a non-existing routing protocol, without the use of an application-level framework. If somebody could push me in the right direction that'd be awesome. note: I need this to be a routingprotocol and not an application, since I want this to work on op of the network layer for performance reasons. Thanks!

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• Recommend a UK based VPS host equivalent to Dreamhost [closed]

  - by Pez Cuckow

  I appreciate this question could be considered subjective and argumentative so can people make recommendations rather than arguing about the best. I believe the "correct" answer is the one closest to what I am looking for. Basically I live in the UK but have been using the US based Dreamhost for about 6 years now, and my web projects are getting to the scale where the websites need to the UK based to cope with the demand and load. I originally had shared hosting with Dreamhost but upgraded to a VPS a while ago, getting 512mb of RAM, unlimited disk space, bandwidth and domains for $30. Their control panel is a custom easy to use build that they have created in house and offers features very similar to other web panels (as far as I am aware). So basically my question boils down to, is there anywhere that offers an equivalent package? In all honesty as long as I have over 50gb HDD space and unlimited domains it doesn't really matter? Are there any VPS providers you would recommend as reliable? I promise to check every link posted, many thanks for your time!

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• Sync Local ICS File with Android via Exchange/Outlook

  - by sinDizzy

  At my company we have a 3rd party app which tracks off-hours duty for all of our engineers. The app is not web-enabled and we cannot make any changes to it. It does write a simple text file and I have created an app that translates that to an ICS file. My goal is to have that appear on my calendar on my Android phone. Here is the path I am working on: DutyApp -- TextFile -- ICSFile -- Outlook(exchange) -- Android (via exchange sync) My problems: If I place the ICS file on our FILE server and then in Outlook if I go to the option CalendarOpen CalendarFrom Internet it shows up in Outlook and looks pretty good. After a couple minutes it shows up on my Android phone as well. If I change the original ICS file those changes never display in Outlook and never sync to my Android phone. This seems to be a one shot deal almost like an import. Now if I place the ICS file on our WEB server and then in Outlook if I go to the option CalendarOpen CalendarFrom Internet and use webcal:\ as the address, it shows up in Outlook and also looks pretty good. Any changes I make to the original ICS file display in Outlook. However the entire calendar never shows up in Android. This calendar is a subscription and it seems, although am not sure, that Android doesn't display Exchange subscription calendars. Yes I know it works with Gmail subscription calendars but this is Exchange. So my question is what other options are there? We are behind a firewall so cant link the ICS file to a Gmail account. I can't put the ICS file anywhere else other than our file or web server.

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• Nginx: Disallow index.html in URL

  - by Martin Vilcans

  We're generating a site consisting of only static files (using Assemble). Having the .html extension on URLs looks so nineties, so we generate every static HTML file in its own directory and call it index.html. For example, the url http://www.example.com/foo/bar/ is in the file /var/www/foo/bar/index.html. This works well, but there is one small thing nagging me: Now there are two possible URLs to the same resource: http://www.example.com/foo/bar/ (slash URL) http://www.example.com/foo/bar/index.html (index.html URL) By accident someone may link to the index.html form of the URL, which is bad for SEO and looks ugly (remember the nineties?). Is it possible in Nginx to give a 404 error on the index.html URL, but serve the slash URL? I tried this: location ~ /index\.html$ { return 404; } But it seems that Nginx does some internal rewrite of the slash URL to the index.html URL, and then matches this location so we get a 404 even on the slash URL. Note that to catch mistakes, we want index.html URLs to be an error, not just redirect to the slash URL.

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• What could be wrong with my VLAN?

  - by Matt

  I've got a VLAN 10 setup as a management VLAN. The management VLAN comes off port 48 and links to another set of switches that do not support VLAN's so it was I believe set up as an untagged access port. In the past this was a different brand of switch and this worked fine. However, since changing to the HP V1910-48G series I can't seem to get this working. I must point out that as far as I'm aware it is wired up properly (I can't check this physically as I'm working remote and have asked the tech who's got access to double check for me). Now I don't have a huge amount of experience with VLAN environments but AFAIK this is right. I've set the port 48 (linked to the management switches) as an untagged port with PVID 10 and access link type. Is this all I'd need to do from a configuration perspective to ensure all devices connected to port 48 would end up being on VLAN 10 and not needing to tag their frames. i.e. the tag would be added by the switch before being forwarded.

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• How to add "create a new python file" to the registry

  - by Anthony

  I have Python 3.2 on a windows 7 operating system. The other day I thought that it would be convenient to add a link to create a new .py file in the right hand click "new" menu. I had worked with the registry before and looked up how to add an item to the "new" menu, but when I got to the registry under HKEY_CLASSES_ROOT the .py extension key was not there. I only know how to add something to the "new" menu using the extension key. I searched the web, but could not come up with any other ways. Python works perfectly fine, and I don't want to mess anything up by adding the extension key. So here are my questions: Will I mess up python or something else by adding a .py key?( I know it is dangerous to work with the registry, that is why I am looking for a safe solution) If not how can I go about doing this? OR Is there a different way to add "create a new python file" to the "new" menu? If so how can I do it? OR If the only way is very complicated should I forget about it? Thank you in advance. P.S I originally posted on Stack Overflow that they told me to move it over here.

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• Get the Windows Scheduler's Location Or Code?

  - by Ram

  Today i got a task to find the scheduler that is running once in a month, actually I have to change its running time period to once a week. I have searched for it in the Windows scheduled tasks, but i didn't find it. It is sending a mail containing a link. Now i am not confused about this where else can i find it. As the place i know where the scheduler can be, has already been checked by me. Can someone suggest me where else can i search for this scheduler? As per the previous developer's comment "It is a normal Windows method of scheduling tasks" UPDATE Actually the task is running after a month periodically. As per my knowledge it could be a "Windows Task Schedule" or "Windows Service" created by the old developer. Now as the previous developer is not available and i do not have any documentation.. i need to change the time period from month to weakly. I have checked in the "Task Schedules" on the server and checked the services running ob the server and was unable to find the "Scheduler". now i have two questions: is there any other approach by using that i can schedule an automated email periodically. any idea to find this.

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• Nginx Server Block Not Working? - Already running other vhosts just this one not working

  - by daveaspinall

  Im running a Debian 6 LEMP server with multiple virtual hosts and everything has been fine for 5 or so sites. But I've just tried adding another but for some reason it's just not working. By not working I mean in Chrome I get the "Oops! Google Chrome could not connect to subdomain.domain.net" error. I've changed the domain for security to subdomain.example.com and the IP is masked. Hosts file (I have multiple sub domains): xxx.xxx.xx.xxx *.example.com *.example Server Block: server { listen 80; server_name subdomain.example.com; access_log /srv/www/subdomain.example.com/logs/access.log; error_log /srv/www/subdomain.example.com/logs/error.log; root /srv/www/subdomain.example.com/public_html; location / { index index.html index.htm index.php; } location ~ \.php$ { include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; } } I've created the system link to the file in the /etc/nginx/sites-enabled/ directory and restarted/reloaded nginx. DNS seems fine: # ping -c 2 subdomain PING subdomain.example.com (xxx.xxx.xx.xxx) 56(84) bytes of data. 64 bytes from www.example.com (xxx.xxx.xx.xxx): icmp_req=1 ttl=64 time=0.035 ms 64 bytes from www.example.com (xxx.xxx.xx.xxx): icmp_req=2 ttl=64 time=0.048 ms Checking the file with cURL works: # curl http://subdomain.example.com HTML - OK Emptied browser cache but still no dice. Anything I'm missing? Like I mentioned, I have a few sites running fine on the server currently so php-fpm etc etc are working. Any help would be much appreciated! Cheers, Dave

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• Windows 7 Explorer: how to show total size of all files in current folder?

  - by matt wilkie

  In Windows XP Explorer one can turn on Status Bar which shows, among other things, the total size of all the files in the current folder, or if the cumulative size of the selected files. How do I get the same at-a-glance information in Windows 7? Selecting files doesn't count as it stops after 15 files, and it's rare that I'm concerned about total size with that few files (it's pretty easy to estimate in my head). thanks. UPDATE: Information derived from the context menu (select r-click properties) isn't "at a glance", and not as smooth as selecting files and clicking the details link at the bottom in any case. Thank you for fleshing out more of the available routes though. Yes Q19232 is similar to this one, though it is not a duplicate. That question is about looking for easy free-space on disk stats and this one is easy used-space by contents of this folder stats. The answer for both is the same though. You can't! Hopefully someone will figure how to get this lost feature back with a shell extension or something.

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• Is it bad to redirect http to https?

  - by jasondavis

  I just installed an SSL Certificate on my server. I use a web hosting panel called ZPanel that is an open source project. It then set up a redirect for all traffic on my domain on Port 80 to redirect it to Port 443. In other words, all my http://example.com traffic is now redirected to the appropriate https://example.com version of the page. The redirect is done in my Apache Virtual Hosts file with something like this... RewriteEngine on ReWriteCond %{SERVER_PORT} !^443$ RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R,L] My question is, are there any drawbacks to using SSL? Since this is not a 301 Redirect, will I lose link juice/ranking in search engines by switching to https? I appreciate the help. I have always wanted to set up SSL on a server, just for the practice of doing it, and I finally decided to do it tonight. It seems to be working well so far, but I am not sure if it's a good idea to use this on every page. My site is not eCommerce and doesn't handle sensitive data; it's mainly for looks and the thrill of installing it for learning. UPDATED ISSUE Strangely Bing creates this screenshot from my site now that it is using HTTPS everywhere...

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• How to connect computers to a network printer behind a router?

  - by kokbira

  General question: How to connect computers to an IP printer behind a router? Particular question: How to connect C-1 and C-2 to PRI? What? Where? [ISP] | | -> IPs:200.X.X.X/other configs:DC | [R-1] | | -> IPs:10.1.X.X locked by MAC,M:255.0.0.0,G:10.1.0.1 |¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯| | | [PRI] IP:10.1.7.7 [R-2] IP: 10.1.0.1,MAC:A | | -> IPs:192.168.1.X,M:255.255.255.0,G:192.168.1.1 |¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯| | | [C-1] IP:192.168.1.2 [C-2] IP:192.168.1.3,MAC:A Glossary and details: ------------------------------------------------------------------------------------ - IP: IP. - IPs: Some IP range. - M: Mask. - G: Gateway. - MAC:A: A MAC address that I will not inform you :) - DC: Don't care. - ISP: Internet Service Provider (not so much details about it on that case). - R-1: A real router or some concatenated so IP range bellow that block is 10.1.X.X and above is ISP. The provided IPs are provided by MAC. As all available addresses are in use, you must clone an existing one to join with a new device (and to disconnect the cloned one). - PRI: An network printer (some people here call that IP printer). - R-2: A TP-LINK TL-WR340G, mine wireless router (since my computer does not have ethernet input, it is my ethernet-wifi adapter :), admin access, MAC address cloned from C-2 (MAC:A). I've to configure 10.0.1.1 and 10.0.1.2 as DNS addresses, other wise I cannot connect C-1 and C-2 to Internet. - C-1: My computer, a CCE XLE-425 (remember: no ethernet input), with Windows 7, admin access. - C-2: another computer with better configs than mine, MAC:A, Windows XP. Requirements: I want to print, to access Internet and to do it myself (no need to call network admin men in black people). Pay attention to MAC clones and DNS info.

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• How can I install .NET framework 3.5 on XP machines without internet connection?

  - by EricSchaefer

  I want to install .NET framework 3.5 on a couple of machines that do not have internet access. If I install the "no internet access"-package it still wants to download something. How can I figure out what is missing? Are there other installation packages? Edit: I would present screenshots but I cannot upload anything from here and the shots would be in german. So I present only the text translated back to english... Installing the "full redistributable package": At the bottom of the license agreement page it display this text: Size of download file: 67 MB Appoximate download time: 2h 44min (56KBit/s) 18min (512KBit/s) It shows the text even if I installed Windows Installer 3.1. After agreeing it displays the "Download and Installation Status"-Dialog with a progress bar labeled "Download:" and Status: Connection to server attempted (try X of 5). Total Download Status: 56MB/67MB I tried it in a VM with no network connection. It tries 5 times while the progress bar shows progress. Later the progress bar is labeled "Installation:". Even later it reports problems during setup and provides two buttons "Send Report Later" and "Don't Send". Now here it comes: "Setup completed" and "Microsoft .NET Framework 3.5 has been deinstalled successfully." (Emphasis is mine) "It is recommended to install current service packs and security updates. More information at Windows Update (link)." Edit2: Installed Service Pack 3, but still no success.

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• need to bring back win 7

  - by user290513

  I like making music and playing games and occasionally do some Photoshop. I had a windows 8 computer but my mouse pointer always got stuck, so to try out something new I installed Ubuntu. here is how I installed it: Went to advanced statup options clicked on "use a device" after plugging in my bootable USB with Ubuntu replaced my windows 8 and installed Ubuntu 14.04 LTS I hope I did it correctly though. So after a few months I could've really find out a good Audio Production (not LMMS, because I use Stagelight) software nor something that could be familiar to the UI of Photoshop. So I decided to bring back Windows, but because of the bad experience of 8 I thought about bringing back win 7 So I used an app named WinUSB to make my bootable USB drive after formatting it to NTFS in GParted But when I go to my grub menu, my USB doesn't show up and my PC being a UEFI device. I don't know how to get to the bios of my device. Can somebody tell how to install Windows 7 completely and deleting Ubuntu or at least give me a link to a tutorial. I have a netbook: it is an Acer Aspire One 725. I'm fine with using commands in terminal and another thing that my laptop doesn't have a CD drive or reader, I can't put a CD inside

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• Monitoring instantaneous network throughput at one second intervals?

  - by Shaddi

  For a testing setup I have, I need to monitor the throughput through a "router"* at regular intervals of around 5 seconds or less (sub-second intervals would be very nice, but not required). Ideally, I would be able to generate a file which contained both the number of bytes and packets seen during each interval. I will eventually be generating a time-series of throughput from this data. On a previous setup using an older version of FreeBSD, there was a tool called "bpfmon" which gave me this information. However, I need to do this under a modern version of Linux (namely, Ubuntu 11.04). I have looked at both iptraf and iftop, but these do not appear to provide the resolution I need, nor do they seem to easily allow scraping the data I need. I understand iptables statistics may be able to give me what I'm after, but the examples I've seen of this seem to rely on repeatedly reading and resetting traffic counters, which seems like it could give inaccurate as read/reset is not an atomic operation. I already capture a tcpdump trace of the traffic I'm interested in on the link I want to monitor, so I am open to approaches which simply parse that. I feel like this must be a common problem though, so I am hoping there will be a standard "best practice" tool for accomplishing this. *I say "router" in quotes because I am really talking about a machine with two bridged NICs through which all the traffic I'm interested in passes.

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• Computer won't start after installing new video card

  - by Vercas

  So, 1 year and 340 days ago I bought a desktop computer. Since then, it has served me well. But lately, I wanted an upgrade, so I bought a new video card. I documented myself about the compatibility, and it is okay. So I opened the case, cleaned up that... dust elemental living inside of it. Unscrewed the plastic thingie on the outside to unscrew the old video card. Because of the stupid arrangement of the ports, I had to unscrew the motherboard to unplug it. So I unscrewed it, removed the old card, put in the new one, moved the motherboard back, screwed it back in, screwed the video card on the holder... thingie, and screwed the plastic thingie back in. Everything went smoothly, nothing had to be forced in/out. I connected the external power supply, closed the computer case, put the tower back in it's place and all the cables back in. When I pressed the power button, the LED turned... some color I can't distinguish. It stayed that way for a second, and then it went off. I tried a bunch of things, including permuting the external power supply arrangement (1 connection, 2 connections and no connections), with no success. And here are some of the specifications: Motherboard manufacturer: Asrock Processor: AMD Athlon II X2 3.0 GHz RAM: 2 x 2GB (had only 1 initially, bought the second plate a bit later) OLD video card: AMD Radeon HD 5450 NEW video card: Gigabyte nVidia GeForce GTX 650 GPU, 1GB GDDR5 128bit PCI-E, Dual-link DVI-Dx2 / HDMI / D-Sub Power supply: 450W + all the requirements I managed to find on the internet are met (+12V 18A or something) More specific information is stored... On that computer. If required, I may open the case again and read the stickers to find more specific information. I can also provide photos if necessary. Any ideas? Suggestions? Something? :|

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• Cisco configuration for public library internet

  - by AlternateZ

  I'm a C/C++ computer programmer turned IT support guy working for a public library. My day is usually spent helping random grandparents learn how to use email, so my networking knowledge is limited to what I can glean from google. Here's the situation. We have a public library with 20 PCs on a LAN and also public wifi access. Previously we were running all of this on 1 ADSL connection and people complained about low speeds. We hired a networking company to set up a Cisco dual-WAN router for us, and purchased an additional ADSL connection. The intention was to give the LAN PCs a guaranteed amount of bandwidth each, and then let the wifi users split the rest. The results were far worse than what we expected, and all we got from the company was excuses and they've since washed their hands of us. During busy periods, net performance on the LAN PCs are so poor that attaching files to gmail etc often times out and fails - far from the "guaranteed amount of bandwidth each" that we hope for! Sometimes it feels like performance is worse than before when we had 1 ADSL link and an unconfigured router? Anyways, surely this is a problem encountered a million times over across the world? (Sharing internet across many users effectively.) What are standard solutions for something like this? I admit to not even knowing the right jargon to google for (load balancing?) I'd appreciate any links to resources/guides that might help me get a better understanding of the problem/solutions, and perhaps some stories of your own experience in solving similar problems. This will help us evaluate and negotiate with network consultants in the future. If its relevant, our router config contains a section "policy-map" with "bandwidth percent" for each class of user (LAN, wifi), and "fair queue".

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• Securing NTP: which method to use?

  - by Harry

  Can someone good at NTP configuration please share which method is the best/easiest to implement a secure, tamper-proof version of NTP? Here are some difficulties... I don't have the luxury of having my own stratum 0 time source, so must rely on external time servers. Should I read up on the AutoKey method or should I try to go the MD5 route? Based on what I know about symmetric cryptography, it seems that the MD5 method relies on a pre-agreed set of keys (symmetric cryptography) between the client and the server, and, so, is prone to man-in-the-middle attack. AutoKey, on the other hand, does not appear to work behind a NAT or a masquerading host. Is this still true, by the way? (This reference link is dated 2004, so I'm not sure what is the state of art today.) 4.1 Are public AutoKey-talking time servers available? I browsed through the NTP book by David Mills. The book looks excellent in a way (coming from the NTP creator after all), but the information therein is also overwhelming. I just need to first configure a secure version of NTP and then may be later worry about its architectural and engineering underpinnings. Can someone please wade me through these drowning NTP waters? Don't necessarily need a working config from you, just info on which NTP mode/config to try and may be also a public time server that supports that mode/config. Many thanks, /HS

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• iptables : how to allow incoming ftp traffic?

  - by logansama

  Hi, Still fighting my way through the jungle that is called iptables. I have managed to allow FTP access outside of our LAN: both these would work. NOTE: eth0 is the LAN interface and eth1 is the WAN interface. iptables -t filter -A FORWARD -i eth0 -p tcp --dport 20:21 -j ACCEPT or iptables -A FORWARD -i eth0 -o eth1 -p tcp --sport 20:21 --dport 1024:65535 -j ACCEPT But when i connect to a external FTP server i manage to log in and all is fine until it wishes to List the directory content. Then nothing happens as the data is blocked, due to the fact that i do not have a rule set up to allow it! (my last rule on the FORWARD chain is to block all traffic) I have tried a gazillion rules (many of which i did not understand) to try and allow the FTP traffic back through my server. One such rule for example was: iptables -A FORWARD -i eth1 -o eth0 -p tcp --sport 20:21 --dport 1024:65535 -j ACCEPT But i cannot get the List to work. It just times out after a while. Would anyone perhaps know how to build a rule which would allow FTP to List / allow such traffic back? Or have a link to sources i could work through? Thank you,

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• Nginx: Loopback connection via PHP's getimage size crashes server (Magento's CMS)

  - by Alex

  We were able to trace down a problem that is crashing our NGINX server running Magento until the following point: Background info: Magento Backend has a CMS function with a WYSIWYG editor. This editor loads some pictures via a controller in magento (cms/directive). When we set the NGINX error_log level to info, we get the following lines (line break inserted for better readability): 2012/10/22 18:05:40 [info] 14105#0: *1 client closed prematurely connection, so upstream connection is closed too while sending request to upstream, client: XXXXXXXXX, server: test.local, request: "GET index.php/admin/cms_wysiwyg/directive/___directive/BASEENCODEDIMAGEURL,,/ HTTP/1.1", upstream: "fastcgi://127.0.0.1:9024", host: "test.local" When checking the code in the debugger, the following call does never return (in ´Varien_Image_Adapter_Abstract::getMimeType()` # $this->_fileName is http://test.local/skin/adminhtml/base/default/images/demo-image-not-existing.gif` # $_SERVER['REQUEST_URI'] = http://test.local/admin/cms_wysiwyg/directive/___directive/BASEENCODEDIMAGEURL list($this->_imageSrcWidth, $this->_imageSrcHeight, $this->_fileType, ) = getimagesize($this->_fileName); The filename requests is an URL to the same server which is requesting the script a link to a static .gif that is not existing. Sample URL: http://test.local/skin/adminhtml/base/default/images/demo-image-not-existing.gif When the above line executed, any subsequent request to the NGNIX server does not respond any more. After waiting for around 10 minutes, the NGINX server starts answering requests again. I tried to reproduce the error with a simple test script that only calls getimagesize() with the given URL - but this not crash. It simple leads to an exception saying that the URL could not be loaded (which is fine as the URL is wrong)

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• Installing Visual Studio Express on Windows 8.1

  - by robrene

  I've been trying to install the latest version of Microsoft Visual Studio Express from their website to toy around with the IDE and C# development in general. I have a relatively fresh and completely vanilla installation of Windows 8.1 Professional x64 for this purpose. I come from a Linux background, where installing software (especially software distributed by the maintainer of the OS) is usually done with package managers. First, I tried to look for Visual Studio in the Windows 8 Store. There was one entry, but it did not have an installation button. Instead, it redirected me to their website. From all the products listed under the "Download" section on their website, I decided Visual Studio 2013 Express for Windows Desktop was the best for me. I selected it and clicked on "Install now". An installer program downloaded, and I'm assuming that the installer downloaded the necessary files as it was running. When it was done, it asked for a reboot, to which I obliged. However, I can't seem to find the IDE installed anywhere? It doesn't show up anywhere in the Start menu interface. I can't find any executables that look like they might be the IDE in its installation folder. Running the installer again and selecting "Repair" does download some files, but after its requested reboot, nothing has changed. The only thing that I can find is an advertisement link to "Try other Visual Studio 2013 Products" in my start menu. I suppose my question is what I have to do to run Visual Studio 2013 Express on Windows 8.1? Am I not looking in the right places? Am I doing the installation process wrong? Thanks in advance

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• Why is there no /usr/bin/ in windows? Would it be dangerous to the entire Program Files to the path?

  - by dotancohen

  I am a Linux user spending some time in Windows and I'm trying to understand some of the Windows paradigms instead of fighting them. I notice that each program installed in the traditional manner (i.e. via orgasmic installers: Yes, Yes, Yes, Finish) adds the executables to C:/Program Files/foo/bar.exe and then adds a shortcut to the Desktop / Start Menu containing the entire path. However, there is no common directory with links to the software, i.e. C:/bin/bar.exe which would link to C:/Program Files/foo/bar.exe. Therefore, after installing an application the only way to use the application is via the clicky-clicky menus or by navigating to the executable in the filesystem. One cannot simply Win-R to open the run dialogue and then type bar or bar.exe as is possible with notepad or mspaint. I realize that Windows 8 improves on this with the otherwise horrendous Start Screen which does support typing the name of the app, but again this depends on the app having registered itself for such. Would I be doing any harm by adding C:/Program Files recursively to the Windows path? I do realize that there will be name collisions (i.e. uninstall.exe) but could there be other issues?

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• Seperate external and intranet portals using the same functions .htaccess

  - by jezzipin

  We are currently struggling with setting up rules for a .htaccess file for a website built upon our company product. The product is built using PLSQL and procedures can be accessed using URLs. We use this functionality to present different options to our users. These options can be injected into HTML pages using replacement tags. So, the tag [user_menu] is always replaced with: /wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} for external sites and /intranet/wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} for internal sites. The issue we are having is twofold. We need to write our .htaccess rules so that the user can access the functionality whether they are internal or external. So, the links should work as follows: http://www.example.com/wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} or http://www.example.com/internal/wd_portal_cand.menu?p_web_site_id={variable1}&p_candidate_id={variable2} This is the other problem. As you can see for the internal link above, the procedure needs to be prefixed with internal instead or intranet. We cannot change this in our standard tags as this will affect other sites so we need to achieve this also using htaccess. Could anyone assist with this issue? I apologise if this is brief or confusing but it's something i've never done before and have been given the task of doing. I apologise for the lack of code that will be posted above however I am a front end developer and have been left to make these changes having no prior experience of .htaccess to please bare with me.

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