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• Website pages very slow to load on first access

  - by Merianos Nikos

  I have a production web server that makes sites to be very slow when load for first time. After the first time all connections are normal and fast. In the following screen you can see the first test I have run for a random site in my server: and here you can see the result of the second time request: As you can see there is a big change in the second load of the same page. Here is the page load time graph: My problem is that I don't really know anything about Red Had Linux server, and also I don't know where can I start. Can somebody to help me ? I like to find out the solution for the long time "wait" in connection. I know that my question is very minimal, but you can always ask me to give you information about the server.

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• Ubuntu: Move fsbackup backups to Amazon S3

  - by Alexander Gladysh

  I have a legacy server (Ubuntu 9.10 Karmic x86), where previous admin set up backups with fsbackup. This server lives in a VPS (under some kind of Xen), and it is low on HDD space (16 GB total). Now it came to a point, where fsbackup backups take more space than the rest of data in the system. The filesystem is 100% filled, and I already cleaned up all that I could, aside from actual backups. I do not have any experience managing fsbackup, and I do not want to break or lose the backups. Googling fsbackup gives surprisingly low quality results... Here is how my backups look like: $ sudo ls -lh /var/archives total 8.1G -rw-rw---- 1 root root 318 2011-01-06 06:26 myserver-20110106.md5 -rw-rw---- 1 root root 258 2011-01-07 06:26 myserver-20110107.md5 -rw-rw---- 1 root root 318 2011-01-08 06:26 myserver-20110108.md5 -rw-rw---- 1 root root 318 2011-01-09 06:26 myserver-20110109.md5 -rw-rw---- 1 root root 346 2011-01-10 06:43 myserver-20110110.md5 -rw-rw---- 1 root root 14M 2011-01-06 06:26 myserver-all-mysql-databases.20110106.sql.bz2 -rw-rw---- 1 root root 14M 2011-01-07 06:26 myserver-all-mysql-databases.20110107.sql.bz2 -rw-rw---- 1 root root 14M 2011-01-08 06:26 myserver-all-mysql-databases.20110108.sql.bz2 -rw-rw---- 1 root root 14M 2011-01-09 06:26 myserver-all-mysql-databases.20110109.sql.bz2 -rw-rw---- 1 root root 862 2011-01-10 06:43 myserver-all-mysql-databases.20110110.sql.bz2 -rw-rw---- 1 root root 827K 2011-01-03 06:25 myserver-etc.20110103.master.tar.gz -rw-rw---- 1 root root 16K 2011-01-06 06:25 myserver-etc.20110106.tar.gz -rw-rw---- 1 root root 16K 2011-01-07 06:25 myserver-etc.20110107.tar.gz -rw-rw---- 1 root root 16K 2011-01-08 06:25 myserver-etc.20110108.tar.gz -rw-rw---- 1 root root 16K 2011-01-09 06:25 myserver-etc.20110109.tar.gz -rw-rw---- 1 root root 827K 2011-01-10 06:25 myserver-etc.20110110.master.tar.gz -rw------- 1 root root 36K 2011-01-10 06:25 myserver-etc.incremental.bin -rw-rw---- 1 root root 29M 2011-01-03 06:25 myserver-home.20110103.master.tar.gz -rw-rw---- 1 root root 11K 2011-01-06 06:25 myserver-home.20110106.tar.gz -rw-rw---- 1 root root 14K 2011-01-07 06:25 myserver-home.20110107.tar.gz -rw-rw---- 1 root root 11K 2011-01-08 06:25 myserver-home.20110108.tar.gz -rw-rw---- 1 root root 11K 2011-01-09 06:25 myserver-home.20110109.tar.gz -rw-rw---- 1 root root 2.0M 2011-01-10 06:25 myserver-home.20110110.master.tar.gz -rw------- 1 root root 27K 2011-01-10 06:25 myserver-home.incremental.bin -rw-rw---- 1 root root 1.5G 2011-01-03 06:29 myserver-opt.20110103.master.tar.gz -rw-rw---- 1 root root 1.5M 2011-01-06 06:25 myserver-opt.20110106.tar.gz -rw-rw---- 1 root root 1.5M 2011-01-07 06:25 myserver-opt.20110107.tar.gz -rw-rw---- 1 root root 1.5M 2011-01-08 06:25 myserver-opt.20110108.tar.gz -rw-rw---- 1 root root 1.5M 2011-01-09 06:25 myserver-opt.20110109.tar.gz -rw-rw---- 1 root root 1.5G 2011-01-10 06:30 myserver-opt.20110110.master.tar.gz -rw------- 1 root root 201K 2011-01-10 06:30 myserver-opt.incremental.bin -rw-rw---- 1 root root 2.3G 2011-01-03 06:41 myserver-srv.20110103.master.tar.gz -rw-rw---- 1 root root 44M 2011-01-06 06:26 myserver-srv.20110106.tar.gz -rw-rw---- 1 root root 27M 2011-01-07 06:25 myserver-srv.20110107.tar.gz -rw-rw---- 1 root root 39M 2011-01-08 06:26 myserver-srv.20110108.tar.gz -rw-rw---- 1 root root 2.0M 2011-01-09 06:25 myserver-srv.20110109.tar.gz -rw-rw---- 1 root root 2.7G 2011-01-10 06:42 myserver-srv.20110110.master.tar.gz -rw------- 1 root root 3.4M 2011-01-10 06:42 myserver-srv.incremental.bin I'm thinking about moving backups to Amazon S3, but before that I have to free some space, so the server can work. Perhaps I can mount /var/archives to an Amazon S3 bucket somehow... Any advice?

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• old ssl certficate didn't go away on apache2

  - by user1212143

  I have replaced the old ssl certficate with new one and restart apache several time but the old certificate still show on web browser and when I run a command openssl s_client -connect 127.0.0.1:443 -showcerts also I have delete all old certficate files. so not sure where apache still read these certficate. and not read the new one. here is my ssl.conf Listen 0.0.0.0:443 SSLEngine on SSLOptions +StrictRequire <Directory /> SSLRequireSSL </Directory> SSLProtocol -all +TLSv1 +SSLv3 SSLCipherSuite HIGH:MEDIUM:!aNULL:+SHA1:+MD5:+HIGH:+MEDIUM SSLMutex file:/usr/apache2/logs/ssl_mutex SSLRandomSeed startup file:/dev/urandom 1024 SSLRandomSeed connect file:/dev/urandom 1024 SSLSessionCache shm:/usr/apache2/logs/ssl_cache_shm SSLSessionCacheTimeout 600 SSLPassPhraseDialog builtin SSLCertificateFile /usr/apache2/conf/ssl.crt/server.crt SSLCertificateKeyFile /usr/apache2/conf/ssl.key/server.key SSLVerifyClient none SSLProxyEngine off <IfModule mime.c> AddType application/x-x509-ca-cert .crt AddType application/x-pkcs7-crl .crl </IfModule>

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• What backup solution for Windows 2008 R2 servers on XenServer 5.0?

  - by Niels R.

  A friend of mine is hosting a lot of Linux VM's on his servers using XenServer 5.0. He uses rdiff-backup to make daily backups. I'm trying to convince him to host some Windows VM's (Windows 2008 R2 Web Edition) too, so he could provide (me) .NET hosting. The main problem at the moment is a backup strategy for these Windows VM's. I would like to see something like a weekly full backup (snapshot of the VM?) with daily incrementals. I've looked at Windows Backup, but because the backups are made onto network shares it doesn't provide incrementals (for what I understand). Does anyone has any experience with this situation? How did you solve this in a "not-too-hard-to-install/maintain" way?

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• Useful scripts for Sikuli

  - by Ivo Flipse

  Thanks to Lifehacker I came across Sikuli which is described as: Sikuli is a visual technology to search and automate graphical user interfaces (GUI) using images (screenshots). The first release of Sikuli contains Sikuli Script, a visual scripting API for Jython, and Sikuli IDE, an integrated development environment for writing visual scripts with screenshots easily. Sikuli Script automates anything you see on the screen without internal API's support. You can programmatically control a web page, a desktop application running on Windows/Linux/Mac OS X, or even an iphone application running in an emulator. As this looks very promising, perhaps complementary to AutoHotKey I'm curious what scripts you guys will come up with. Especially since this program is portable and could solve "simple" Super User problems. Example script from their documentation: setThrowException(True) setAutoWaitTimeout(10000) switchApp("System Preferences.app") click() click() click() click() wait() type("192.168.0.1\t") type("255.255.255.0\t") type("192.168.0.254\t") click()

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• What's a good Linux distro for an older PC?

  - by jdamae

  I'm new to Linux and I am interested in installing it on an older computer I have. I want to set a web server up, and install PHP and Perl on it. My PC is an older HP Pavilion a255c, with an Intel Pentium 4 processor and 512 MB of RAM. I will probably add some more memory later. This PC is more like a sandbox than anything, but I would like to get started quickly with the OS. Is there a particular flavor of Linux I would need to download because I have an old computer? I was thinking about Ubuntu, but I'm not sure what version to go with.

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• Windows Live Messenger giving me 8100030d on sign-in

  - by Rob Farley

  I'll bullet point things of note: Other accounts work on the same machine. This is a problem across a few machines. I can sign in no problem on some machines. I can use Web Messenger on the problem machines. I'm using the latest version of Messenger. I've uninstalled, rebooted, reinstalled, rebooted. Deleting the "Windows Live Contacts" folder doesn't help. Deleting the Contacts registry entries doesn't work. I'm not using AVG (and besides, can sign in with other accounts) It successfully connects (and signs me out of eBuddy) before erroring. It creates files in the Windows Live Contacts folder. Windows XP running on the problem machines. I'm not sure what other things it could be... This has also been asked at http://www.experts-exchange.com/Software/Internet_Email/Chat_-_IM/Q_25449997.html, so let's see which system gets me the better response...

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• apache performance improvements and maxclients

  - by updog

  I know this has been asked a few (thousand) times around the internet but I was hoping someone whose in the know might be able to comment on my particular setup. I have a web server hosting one site (php/codeigniter) with a wordpress blog in a sub directory. The server has 2GB RAM, 3GHz CPU and I have offloaded the static assets to CloudFlare which is has reduced bandwidth for the actual server by almost 75%. The problem I have is when an email campaign is sent out that links to the site or blog, it slows down. Below is my settings in apache2.conf. Average apache process size is 80M and there is 1.5GB available for apache. <IfModule mpm_prefork_module> StartServers 8 MinSpareServers 5 MaxSpareServers 20 MaxClients 20 MaxRequestsPerChild 2000 </IfModule> I have already setup and installed apc and built some caching into the site and used w3totalcache on the blog. The number of concurrent users is around 2-300 when there is a campaign, are there any further optimisations before

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• Cannot Access IIS Website Locally Using www

  - by Reafidy

  I have small website hosted on our WS 2008 R2 server using IIS 7. I can access our website from anywhere in the world using: www.ourwebsite.co.nz But from any local computer on our internal network I can only access the website using: http://ourwebsite.co.nz Our employees are constantly asking why they cant just use www.ourwebsite.co.nz I'm not sure what info to provide. I presume that because the wesbite correctly functions from outside the local network that I have correctly setup our Web DNS A records at our domain host. And the problem may lie with our local DNS configuration.

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• Ironport X-Junk header.

  - by Kyle

  My school uses Ironport for filtering/monitoring web traffic. I have a bit of curiosity as to why it tacks on a x-junk: header onto everything. After going through a few curl tests, I've found no real connection between what is shown on the page and the x-junk: header. here's my curl request: any ideas? Anchorage:~ khotchkiss$ curl -I google.com HTTP/1.1 301 Moved Permanently Location: http://www.google.com/ Content-Type: text/html; charset=UTF-8 Date: Sun, 06 Feb 2011 04:37:25 GMT Expires: Tue, 08 Mar 2011 04:37:25 GMT Cache-Control: public, max-age=2592000 Server: gws X-XSS-Protection: 1; mode=block Content-Length: 219 Age: 108 Via: 1.1 MC-IRONPORT.UNIVERSITY.LIBERTY.EDU:80 (IronPort-WSA/6.3.3-015) Connection: keep-alive X-Junk: xxxxxxxxxxxxxxxxxxxxxxx

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• Scanner Installation: Epson Perfection 3170 Photo, Windows 7 & Adobe Acrobat

  - by Galaxy5727

  I installed the Driver v3.04A from Epson's Web site -- epson12180.exe that is supposedly for Windows 7. Now, the scanner works by itself, i.e. if I hit the scan button I get a dialog menu and can scan with one of the options there but not with Adobe Acrobat. What I need is to have it working from Adobe Acrobat when I go File - Create PDF - From Scanner - Custom Scan... The current state is that I see Scanner: "Please select a device" and no other available devices. I remember I used to see at least 2 other like "WIA Epson Perfection" and smth like "Epson Perfection". "WIA Epson Perfection" is the option that I am hoping to see to move on. Scanner: Epson Perfection 3170 Photo System: Windows 7, 64-bit Software: Adobe Acrobat 9 Pro

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• Beginners security question

  - by Reg H

  Hi everyone, I'm still pretty new to web development, and have a question about security. Every day I look at the "Latest Visitors" in my CPanel, and today there were some strange entries (one is pasted below). Not knowing any better, it looks to me like there is some site that's referring users to my site, for some reason. Can someone explain what these really are, and if it's something to be concerned about? Thanks! Host: 77.68.38.175 /?p=http://teen-37.net/myid.jpg? Http Code: 404 Date: Feb 17 08:13:58 Http Version: HTTP/1.1 Size in Bytes: - Referer: - Agent: libwww-perl/5.805 * /?p=../../../../../../../../../../../../../../../proc/self/environ%00 Http Code: 404 Date: Feb 17 08:13:59 Http Version: HTTP/1.1 Size in Bytes: - Referer: - Agent: libwww-perl/5.805

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• Problems with mailenable when sending to yahoo mail

  - by Mee

  I'm testing sending emails from mailenable webmail. I have no problems sending mail to gmail or hotmail, both work fine, but yahoo mail sends my messages to the spam folder and shows the attachment icon for the message even though the message doesn't contain any attachments, it's just plain text. It only includes a reply to a previous message, like this: message text ----- Original Message ----- original message text I copied the message content and sent it from gmail to yahoo and the attachment icon didn't show which makes me believe it's something with mailenable. What could possibly be wrong? Also, is there a white list for yahoo mail that I can join? And also for other popular webmail? I'm going to use this on a production website (site visitors use the contact us form to send messages to the site - the mail enable server running on the same machine as the web server - then I check the messages using the mailenable webmail and reply them). This is really important to me, your help would be really appreciated ...

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• Stop single NLB node at command line

  - by Patrik Hägne

  We have a NLB cluster set up for our public web servers. I'm trying to stop the "localhost" in the cluster from the command line using NLB.EXE. When I write "nbl stop" it seems that all nodes are stopped but I only want the local node (the server I'm running the command prompt on) to be stopped in the cluster. When I try specifying the node using the command "nlb stop 192.168.182.104:HOSTNAME" it fails, saying "Did not receive response from the cluster". Am I not specifying the cluster and the host correctly?

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• What Raid should I use for Website Static Files / Content

  - by Simon

  I'm building a Web server (IIS7) and would like to know the best practice for storing static content and the uploaded files of website's users (predominantly pictures, but also other documents like pdf's). I will keep the operating System on a Raid 1 array. Where should I be keeping the actual website's pages & files, it's own static content, and that of it's users? Should I be placing this content on a seperate raid array, and if so which type? I was considering using SLC SSD's (Such as the Intel's X25-e) but the following issues came to light. Will the SLC SSD's give any improvement over a 2.5" 15k SAS Drive for this type of content? If I did use SSD's, I'm under the belief I would still need to use Raid for redundancy, yet I've heard Intel X25-e's don't support TRIM. Does this scrap them as a legitimate option?

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• Debug Apache mod_status showing 151 requests/sec - 2.7 GB/second

  - by James Hackett

  One of my web servers went crazy this morning and showed "151 requests/sec - 2.7 GB/second - 140.7 MB/request" the normal is like "11.1 requests/sec - 65.6 kB/second - 5.9 kB/request" I don't even think that kind of through put is possible on my server. It was also listing odd symbols for the urls and the amount of data transfered for connections was off the meter 246-0 -1286402072 0/0/0 ? 0.00 -1444841118 0 -5416403825852416.0 0.00 0.00 °Rk³ 247-0 18 0/0/0 ? -13112985.76 2094967848 0 -5428200825946112.0 0.00 0.00 248-2 23437 0/0/2 _ 0.00 0 0 0.0 0.00 -5340330065920.00 74.53.23.134 web2.mydomain.com OPTIONS / HTTP/1.0 249-2 23279 0/2981898840/0 W 16673317.60 11 0 0.0 2844.06 0.00 201.144.221.245 www.mydomain.com GET /cb8ff49a2395a7b1accbbce1e4cf164f/view/256 HTTP/1.1 250-0 0 40600/3009863336/0 ? 3816369.92 910209710 0 2913775.3 -5323551899648.00 -5324315849947.28 èøϲ Has anyone seen anything like this before and know what might be causing it? I posted the full mod_status output here http://pastie.org/916066

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• Comparison of cloud hosting providers

  - by Abel

  Is there a place where we can compare* the many new arising cloud hosting providers? From reading into each of them, they seem very different and range from just hosting applications (google) to a semi-full enterprise web serving framework (rackspace). Comparing "by hand" takes a lot of time. All have limitations and different prizing, but which are those and how do they compare? I'm looking for an unbiased comparison site, rather then a discussion on "which is the best". * I don't mean a hosting provider comparison site, of which there are many. The properties of cloud hosting providers are remarkably different and don't compare well on classical hosting provider comparison charts.

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• ubuntu 9.10 screen flickering problem on Thinkpad R31 with Intel 83830 Graphics

  - by PA

  I am trying to revitalize an old Thinkpad R31 that has the Intel 82830 graphics and only 256 MB of RAM. I have tried a Xubuntu 9.10 Live CD. After booting the screen blinks so much that it is practically unreadable. I have searched for updated IBM Thinkpad drivers but I only found drivers for Windows on the Thinkpad support web site. EDIT: I have changed the title and the description. It is not a problem of the drivers. It seems to be a problem with the kernel. See my own answer below.

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• Quickly revert an Oracle Database to a known state

  - by Anthony

  I would like to use Selenium to test a web application but in order to do that successfully the tests must be run against a database at a known state. The recording and running of the Selenium tests is not within the scope of this website so I'm only looking for recommendations on how best to revert the database after each test execution. Some details: current database size is 30GB however only about 4GB needs to be reverted database is Oracle 11g Standard Edition running on Windows Server 2003 the data in 6 different schemas needs to be reverted Ideally the process should be scripted so that it can be re-executed frequently and automatically via a scheduled task.

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• IIS7 URL Rewrite for URL with &rsquo;

  - by blizz

  I'm trying to redirect the following URL in IIS7 using the URL Rewrite module: Category/Cat-3/Objectives-of-Pre-Maintenance/WHAT&rsquo;S-THE-STORY-ON-LOW-CARB-DIETS-AND-EXERCISE-.aspx but for the life of me I can not get it. I tried replacing the &rsquo; with an actual single quote, and that worked fine! But for the purpose of this redirect, I need the HTML code for the quote, and not the quote itself. Here is the rule from web config: <rule name="Redirect" patternSyntax="ECMAScript" stopProcessing="true"> <match url="^Category/Cat-3/Objectives-of-Pre-Maintenance/WHAT&amp;rsquo;S-THE-STORY-ON-LOW-CARB-DIETS-AND-EXERCISE-\.aspx" /> <conditions> <add input="{HTTP_HOST}" pattern="www.example.com" /> </conditions> <action type="Redirect" url="http://www.example.com/redirecturl/" appendQueryString="false" /> </rule> Any ideas would be very helpful! Thanks

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• Can not connect to telnet server

  - by BloodPhilia

  So, I can't use telnet to connect to any server but it works fine from a different computer. It just says it can't connect. I tried the following things: Disable firewall and AV protection. (Basically, there was no security feature left online) Telnet is set to "Trusted" in my AV protection. (Kaspersky Internet Security 2011) Using Putty to telnet, but apparently Putty's connection is also inhibited. (Says it can't connect to host) Disabling the telnet client in Control Panel and then re-enabling it. (Windows 7 Ultimate) hosts file is clean. Checked for nasties using MBAM and KIS 2011 as well as going though my HijackThis logs, nothing found. I can connect to the same machines/servers through the web browser, ping, tracert, etc. Only telnet seems to be blocked. Any other thoughts?

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• Sharepoint 2007 Event ID 6482

  - by Dave M

  Our two server SharePoint 2007 SP2 farm has an issue. Event ID 6482 appears in the Application log of the Web front end many times a day. Often many time a minute. The full error is from Office SharePoint Server Event Type: Error Event Source: Office SharePoint Server Event Category: Office Server Shared Services Event ID: 6482 Date: 11/12/2009 Time: 3:05:22 PM User: N/A Computer: XXXXXX Description: Application Server Administration job failed for service instance Microsoft.Office.Server.Search.Administration.SearchServiceInstance (36a9b7ef-59aa-4f94-8887-8bf7b56f2f91). Reason: Error during encryption or decryption. System error code 0. Techinal Support Details: System.ArgumentException: Error during encryption or decryption. System error code 0. at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.SynchronizeDefaultContentSource(IDictionary applications) at Microsoft.Office.Server.Search.Administration.SearchServiceInstance.Synchronize() at Microsoft.Office.Server.Administration.ApplicationServerJob.ProvisionLocalSharedServiceInstances(Boolean isAdministrationServiceJob) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. The SharePoint site appears to be functioning normally and Search returns expected results. Any suggestions would be appreciated

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• VMware Server Guest OS Random Shutdown

  - by radioactive21

  Anyone encounter a problem in which the Guest OS in VMware Server randomly shuts down? This has happened about once a month, where VMware Server just shuts down ALL guests OS. The host machine is fine, and you can log into the web management of VMware Server, it's just all guest OS get shutdown with no apparent reason. Even the logs say vmware guest os so and so was shut down, but no details why. This is not just one one machine, we have VMware server installed on three different PowerEdge servers and they all have encounter the same problem. We've tripped checked all settings and nothing is out of the ordinary.

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• Should I use 802.11n with a 15 Mbps ISP (Comcast Cable)?

  - by stackoverflowuser2010

  I currently own a LinkSys-WRT54GL 802.11a/b/g wireless router, and my ISP is Comcast Cable providing me with 15 Mbps (that's bits per second, I believe) download speed. I am wondering if there is any benefit with using an 802.11n wireless router to access the Internet? The maximum theoretical speed of the WRT54GL router is 54 Mbps (802.11g), which is faster than the 15 Mbps provided by my ISP. I know that 802.11n has a max bandwidth of 300 Mbps, and it would help for intra-house transfers, such as streaming video from one computer to another. But is there any benefit to 802.11n for Internet activity, such as web browswing, gaming, and streaming video from Netflix?

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• Forward Shibboleth Environment Variables to Tomcat via Apache

  - by Deepak Singh Rawat

  I am using Shibbolethv2.3 with Apache web server and Tomcat application server. I am using Apache as a reverse proxy using mod_proxy.so. I am not able to forward the Shibboleth environment variables from Apache to Tomcat. I am able to forward the attributes in the headers but as already mentioned in the wiki this approach is not safe. I have tried forwarding the environment variables by the following directive : SetEnv AJP_username ${username} then at the Java side I can access the attribute by : request.getAttribute("username"); The strange thing here is that, I get a different value instead of the one set by Shibboleth. I get the Windows account name as a result. If I use any other attribute name, I get a null value. I have searched a lot and have run out of options. Please guide me towards the right solution. My setup details : Shibboleth version : 2.3 OS : Windows XP SP3 Webserver : Apache 2.2 Application Server : Tomcat 6 Proxy module : mod_proxy.so

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