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• First request too slow even if I have a load balancer in the back

  - by adrian7

  I have an Apache 2 on Centos + bind with a wordpress website on it (e.g example.com). I have also set up, on another server in a different contry a load balancer (varnish:80 + nginx 127.0.0.1:8080) for it - which task is to server all static content under /wp-content/. Using Simple DNS editor I added an A entry to cdn.example.com pointing to the server's IP. So no extra work from a 2nd dns server. Then using htaccess I redirect all requests to jpg|gif|css|js files to cdn.example.com. That works and all files are saved on the "cdn" server and served right away. My problem is that for the first time I enter on example.com (e.g after restarting the computer or closing the browser) the load time is 1 up to 3 seconds, while any subsequent page loads take only 300 to 600 miliseconds. I know it might be a DNS issue, but I have done a cache check on several websites and cdn.example.com indicates the right IP. Do you have any ideas where I should dig to solve this first-time slowness?

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• Why does CentOS Linux use cpu/core #1 so much more in a 4-core system?

  - by ck_

  I've been watching top and htop for awhile on a very active server and I am wondering why linux does not automatically use cpu affinity better? CPU #1 (actually core #1 of 4) is used much more heavily than the others. Is there a setting similar to what vm.swappiness does for vm swap that forces a preferred affinity pattern? Should I be using forced affinity settings within mysql/apache/nginx/exim to get better results? This is on CentOS 2.6.32-279 x86_64 SMP Thanks for any suggestions.

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• About Web Server

  - by Chathura JAyanath

  I develop web sites. and i'm hope host my web site on my own web server. then i have ms win server 2008 computer with apache and IIS. i host my web site on iis. then it visible in local area network. now i want to open it to world. i have my own web url (www.myurl.lk). domain name provider ask about name server 1 and name server 2. i don't know how can i find my name server. can any one help me to do this? i already try this using upload web site to iis. but it's not work. it can see only local area network.

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• Error configuring virtual hosts

  - by user148351

  i Have a problem using my virtual hosts: When i try to connect to my server on direct ip adress, for example http://111.11.11.111/ in apache error log i see following error: script '/var/www/html/mmm/public/index.php' not found or unable to stat File index.php exists!!! and has correct access rights. I have virtual hosts configured <VirtualHost *:80> DocumentRoot /var/www/html/mmm/public ServerName example.com ServerAlias example.com www.example..com <Directory var/www/html/mmm/public> AllowOverride All </Directory> </VirtualHost> Why when I try to connect to ip address - it try to search index.php not in servers root directory, but in root directory of virtual host.

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• How to connect 2 virtual hosts running on the same machine?

  - by Gabrielle

  I have 2 virtual hosts running on my Windows XP laptop. One is Ubuntu running inside vmware player. The other is MS virtual PC (so I can test with IE6 ). The Ubuntu virtual host is running my web application with apache. I can point my browser on my laptop at the Ubuntu IP and view my web app. I read this post http://stackoverflow.com/questions/197792/how-to-connect-to-host-machine-from-within-virtual-pc-image and was able to get my Virtual PC to ping my physical machine using the loopback adapter. But I'm stuck on getting my Virtual PC to see my web application running in the Ubuntu vmware player host. I appreciate any suggestions.

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• Problem connecting to Ubuntu Server in same local network.

  - by frbry

  I have my LAN set up as below: 192.168.2.1: ADSL Router (DHCP Range: 192.168.2.2-192.168.2.250) 192.168.2.254: Wireless Access Point 192.168.2.253: Ubuntu Server (Static IP) 192.168.2.2: My Laptop (Connects to Internet via the Wireless AP) NAT in router is active and set up to transfer requests made over port 80 to 192.168.2.253. Router's firewall is inactive. No IPs in DMZ. My friends get Apache's It Works page when they try to enter http://my_external_ip. But I get Router's configuration page instead of that. What should I check or do? Thanks.

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• Why doesn't phpMyAdmin connect to MySQL server?

  - by Grafica

  I'm running xampp on Windows 7, and when I type localhost/phpmyadmin, there is an error: phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server. Here's what I did, but I'm still not able to connect: In config.inc.php, changed from true to false: $cfg['Servers'[$i]['AllowNoPassword'] = false; Changed password here: localhost/security/xamppsecurity.php In resetroot.bat, typed new password where it says 'password': echo REPLACE INTO user VALUES ('localhost', 'pma', 'password', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', 'N', '', '', '', '', 0, 0, 0, 0, '', ''); >>resetroot.sql Restarted apache and mySQL I still get the same error message. Thanks in advance!

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• How to set up www cname for free dyndns subdomain

  - by Mk12

  I have a free dyndns domain mk12.gotdns.com How can I set up a cname for www.mk12.gotdns.com to point to mk12.gotdns.com? And how can I force the www one, so that if you navigate to mk12.gotdns.com, it will go to the www one? Note: I don't mean html redirecting, but I think you can do it with url rewriting somehow, something like described here. I've seen many tutorials, but they just vaguely say that you have to enter a cname record, I have no clue what file I need to put it in. Also, please see my question http://stackoverflow.com/questions/1618998/apache-url-rewriting-wont-work about getting url rewriting to work.

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• Make BIND use DHCP DNS as backup

  - by cainmi

  I run BIND locally on my OS X machine, to enable wildcard Apache vhosts, which requires setting the DNS server for all network interfaces to 127.0.0.1. This works great, but means when I am on a network which uses an internal DNS server to route special (i.e. .companyname) URLs to a server on the network, the lookup fails. I tried adding both 127.0.0.1 and the DHCP provided DNS server, but this doesn't work either. Is there a way to make BIND use the DHCP DNS server for requests it cannot resolve locally?

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• Squid stale-while-revalidate not working when max-age=0

  - by Wiliam

  Squid 2.7 always reaches backend, expected is to reach backend using stale-while-revalidate only when cache expires, not when client triggers max-age=0. Script: <?php header('Cache-Control: public, max-age=10, stale-if-error=200, stale-while-revalidate=500'); header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); sleep(2); die("OK"); And squid config: # http_port public_ip:port accel defaultsite= default hostname, if not provided http_port 80 accel defaultsite=mydomain.com # IP and port of your main application server (or multiple) cache_peer 127.0.0.1 parent 8000 0 no-query allow-miss originserver name=main # Do not tell the world that which squid version we're running httpd_suppress_version_string on # Remove the Caching Control header for upstream servers header_access Cache-Control deny all #header_access Last-Modified deny all # log all incoming traffic in Apache format logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh access_log /usr/local/squid/var/logs/squid.log combined all cache_effective_user squid refresh_pattern . 10080 90% 999999 ignore-no-cache override-expire ignore-private icp_port 0

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• Highly robust and scalable search server needed for managing and analyze files

  - by ChrisBenyamin

  Hi everybody, I am looking for a professional search server system with functionality, like e.g. solr http://lucene.apache.org/solr/ holds. Place of action should be a centralized location, whereon many hosts would request data. Furthermore the system should be extensible for implementing statistical procedures. (e.g. a kind of heatmap (or common diagrams) of a (or more) file(s) (which has a guid), that is spread on different hosts.) This software doesn't have to be opensource. thanks. chris

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• How to install Gitlab in a VM on a production server?

  - by Michaël Perrin

  I have a production server running Ubuntu 12.04 and I would like to install on it a VM with Gitlab (using Vagrant and Virtualbox). Let's say that the address to access Gitlab is gitlab.mydomain.com . The DNS zone has been configured to point to the IP address of the server. I want users to be able to access to Gitlab (either for pushing to a repository, or for accessing to the web interface) from the outside. The VM has been configured to have an IP address. It means that when browsing http://gitlab.mydomain.com for instance, the request has to be forwarded to the VM on the server, ie. to the VM IP address. What are the ways to configure this? Can Apache be used as a proxy? In this case, I guess it only works for HTTP requests, but not for pushing to a Git repository on the VM.

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• Solution to Manage and Monitor (Ubuntu) Machines

  - by Elmar Weber

  I'm looking for a tool like Canonical (system management and monitoring for Ubuntu) that is Open Source and free. The goal is to manage a dozen or so KVM machines for private testing purposes. I know of puppet and munin or RHQ as separate tools to manage and monitor, but I'd prefer something integrated. Any tips? Basic requirements would be: system package management and update (individual selection for each managed node) configuration of basic system services (Users, NFS, cron, ideally also Apache) monitoring (charting of system resources, disk, io, memory, etc) and alerting, ideally a default configuration with sensible values for alerts

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• SSL Certificate

  - by Dremarturg

  Hey, I have a mail-server running and I want to buy a SSL-Certificate as they are pretty cheap now. I use mail.domain.com as reverse-DNS, POP3 and SMTP clients use mail.domain.com (some use pop3.domain.com and smtp.domain.com) for sending and receiving e-mails. The SSL-Submission asks me for a domain - is it mail.domain.com or domain.com as I do not have a Wildcard-SSL? I just want to use it for Mail. Or is it possible to use it for both by using domain.com? (Apache and Postfix/Courier on the same server and IP)

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• Rejecting new HTTP requests when server reaches a certain throughput

  - by Sam

  I have a requirement to run an HTTP server that rejects new HTTP requests (with a 503, or similar) when the global transfer rate of current HTTP responses exceeds a certain level. For example, if the web server is transferring at 98Mbps, and a new HTTP request arrives, we would want to reject this (as we couldn't guarantee a good speed). I've had a look at mod_cband for Apache, limit_req for nginx, and lighttpd's rate limiting features, but none of them seem to handle my (rather contrived, granted) use case. I should add that I'm open to using pretty much any web server, and am open to implementing this in iptables rules if someone can craft such a rule! (Refusing the TCP connection is fine, it doesn't have to respond with an HTTP 503). Any suggestions?

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• Why doesn't my htaccess redirect work?

  - by cosmicbdog

  I have setup a simple htaccess redirect which looks like this (this is the whole .htaccess file): Options +FollowSymLinks RewriteEngine On Redirect 301 /something http://something.com/something.php If I then load the site which contains this .htaccess, ie, myredirectsite.com/something I end up with the following 404: The requested URL /something was not found on this server. Apache/2.2.3 (Red Hat) Server at myredirectsite.com Port 80 And the logs: [Tue Jul 10 14:25:46 2012] [error] [client xx.xx.xxx.xx] File does not exist: /home/sites/scp/something Something is not a file, and something does not exist. I have assumed I could use Redirect the same as a Rewrite but it looks like the redirect needs to be for a file that actually exists? I created the file 'something' and it just attempts to load the blank file. No redirect. What am I missing in getting this working?

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• how to configure svn between two remote system on different network?

  - by Ghost Answer

  The story is that I have two systems on two different network IPs (like client on 10.0.15.24 and server on 117.152.18.140). I am communicating between them by team viewer port 80. I have installed svn subversion on server and svn client on client system. I also installed apache server on server system. Now my question is that I want to configure them. first is it possible, if yes, then please give the proper suggestion. Is there any changes to be make in firewall on server or client or both. thanks

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• Trouble with mod_proxy and mongrel_rails

  - by x3ro

  Hey there I'm trying to set up a mod_proxy - mongrel combination, but somehow, apache/mod_proxy is unable to access mongrel locally. The following is my configuration for mod_proxy: ProxyRequests Off ProxyPreserveHost On <Location / ProxyPass http://localhost:3000/ ProxyPassReverse http://localhost:3000/ Order deny,allow Allow from all </Location Mongrel/Rails ist running just fine, because I can access it from my browser, and even with lynx on the server. However, I get the following error when trying to use the proxy: [error] [client 127.0.0.1] Invalid Content-Length I would appreciate any help :D PS: Oh, and the server is running Plesk to configure vhosts, if thats important.

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• I'll be setting up a dedicated web server at work soon, my first non hobby server - What should I know?

  - by Rogue Coder

  I've been running my own dedicated server running CentOS and a LAMP stack for 2-3 years now, but it's only been hosting my own websites which aren't super important. However, I will soon be setting up a Linux Webserver and Linux Database Server at work, and I'm wondering what are some important things I should be doing. It's an internal server only, so only people in the company can access it. Should I get a slave server for both of my servers for backups? If I do this, how many backups should I be keeping and how often should those backups be done? Right now on my current server I run a cron job nightly to backup my MySQL databases (Usually 40mb files once compressed), and bi-weekly cron jobs to backup my web root. I just store these files on my local computer via FTP. Also, for an internal server like this, should I look at using LightHTTPD or NginX to increase performance, or will Apache be fine?

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• Safari, IIS and optional Client Certificates

  - by Philipp

  I've a ASP.Net Webapp running on IIS7.5. The Webserver is configured to accept Client Certifcates. Unfortunately Visitors with Safari Browser are unable to view the Page. Same Problem as described under the following link: http://www.mnxsolutions.com/apache/safari-providing-an-ssl-error-client-certificate-rejected%E2%80%9D-when-other-browsers-work.html Does anyone knows how to solve this? I'd really appreciate your help. edit: Seems to be the same problem: http://superuser.com/questions/231695/iis7-5-ssl-question-safari-users-get-a-prompt-of-certificate-to-select

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• How to identify which website on my instance is receiving lots of traffic?

  - by Bob Flemming

  I am new to server administration and have just setup a new quad core instance which hosts around 15 websites. Over the past couple of days my server load has been averaging at around 15.00. I believe it is because of one (or maybe more) websites are getting spammed by spambots. Typing 'top' at the command line shows many processes from user 'www-data' which indicates lots of web traffic. Is there an easy way identify which one of my sites is taking a hammering? Reading the apache error logs is a very difficult tasks as most of the websites receive daily traffic of 10,000 + unique users. Any help would be appreciated!

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• How to solve virtual host issue

  - by Webnet

  I have multiple sites all setup the same as below except "bk" has something else in it's place... NameVirtualHost *:80 <VirtualHost bk:80> ServerName bk DocumentRoot /var/www/bk.com/ </VirtualHost> and I get these errors when restarting apache: [Mon Jan 17 10:28:56 2011] [error] VirtualHost bk:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results [Mon Jan 17 10:28:56 2011] [warn] NameVirtualHost bk:80 has no VirtualHosts I don't get it... the other 2 sites I have virtual host configurations for this exact same way don't throw any errors update One error message fixed - here's where I'm at now.. <VirtualHost bk:80> ServerName bk DocumentRoot /var/www/bk.com/ </VirtualHost> [Mon Jan 17 10:28:56 2011] [error] VirtualHost bk:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results

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• Cheapest High Available Web Server [closed]

  - by xyz

  I would like to create a high-available setup (e.g. a small cluster) for a webserver, i.e. it will run Apache, PHP and MySQL. There will be between 2-8 small websites running with only very little traffic and workload. High availability is however very important. I don't want to be dependent on 1 datacenter, so there must be a minimum of 2 servers placed in different datacenters, and if one server goes down, the user must experience no or only a minimum of downtime - and no data loss. I have considered Amazon AWS using their Elastic Load Balancing, since it is possible to buy 2 EC2 instances in 2 availability zones and set up load balancing and RDS (Multi-AZ). However this seems rather expensive. Using the AWS price calculator http://calculator.s3.amazonaws.com/calc5.html it totals to 185$/month the first year (including the free tier). Are my calculations incorrect or is there a cheaper way to make this HA setup? Best regards

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• Thin web server - single or multiple instances per IP address:port?

  - by wchrisjohnson

  I'm deploying a rack/sinatra/web socket app onto several servers and will use thin as the web server (http://code.macournoyer.com/thin/). There are almost no views to show, so I am not front-ending it with a traditional web server like Apache or nginx. In general, you see thin started and the underlying config file for it has the number of server instances to start, say 3, and the port to start with, say 5000. So, in my example, when thin starts, it starts up three instances on a range of ports, starting on port 5000. If I have a series of virtual machines, say 3, 6, 9, etc. that I treat as a cluster, would/should I choose to start a single thin instance on each VM, or multiple instances on each VM? Why? Thanks - Chris

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• How to make a server check it's own availability on the web?

  - by Javawag

  Hi all, Just a quick question – my server is running at my house serving www pages at www.javawag.com. The problem is that my home internet connection keeps dropping randomly - for about 10 mins at a time. This is only an intermittent problem and will go away soon I hope. However, my server doesn't recover properly - when the connection comes back, I can still access it at 192.168.0.8 (locally) without any issue, but at www.javawag.com there's no reply! (Just an aside - my home internet connection is dynamic ISP, the domain www.javawag.com points to javawag.dyndns.org which in turn points to my IP, updated every minute by ddclient on the server) Is there some way for the server to check if it's accessible from the outside world periodically, and if not restart Apache/reboot? Oh, and if I reboot the problem fixes itself also! Javawag

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