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• Dynamic virtualhost causing "client denied by server configuration" error

  - by ridan

  I'm trying to configure a dynamic virtualhost on mac: NameVirtualHost *:80 <VirtualHost *:80> ServerName *.*.* ServerAlias *.*.*.* VirtualDocumentRoot "/Volumes/Work/webs/%2" VirtualScriptAlias "/Volumes/Work/webs/%2" <Directory "/Volumes/Work/webs/%2"> Options Indexes FollowSymLinks Includes ExecCGI AllowOverride All order allow,deny allow from all </Directory> </VirtualHost> It causes this error: "client denied by server configuration". When I replace by it works fine... Any ideas ?

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• apache on Cent OS opening default page on https

  - by Asghar

  I am new to apache and SSL and configuration, i got verysign certificte to secure my site. i have public, private and ca_intermediate cert files. i have configured ssl.conf as below VirtualHost _default_:443> DocumentRoot /var/www/mydomain.com/web/ ServerName mydomain.com:443 ServerAlias www.mydomain.com # Use separate log files for the SSL virtual host; note that LogLevel # is not inherited from httpd.conf. ErrorLog logs/ssl_error_log TransferLog logs/ssl_access_log LogLevel warn # SSL Engine Switch: # Enable/Disable SSL for this virtual host. SSLEngine on problem is that when i access www.mydoamin.com with "HTTP" it works fine, but when i access using "HTTPS" it just opens apache default page. but with green "HTTPS" means my certificates are installed correctly. How can i get rid of this situtaion. Thanks EDIT Output of apachectl -S -bash-3.2# apachectl -S [Mon Aug 27 10:20:19 2012] [warn] NameVirtualHost 82.56.29.189:80 has no VirtualHosts [Mon Aug 27 10:20:19 2012] [warn] NameVirtualHost 82.56.29.189:443 has no VirtualHosts VirtualHost configuration: wildcard NameVirtualHosts and _default_ servers: _default_:8081 localhost.localdomain (/etc/httpd/conf/sites-enabled/000-apps.vhost:10) *:8080 is a NameVirtualHost default server localhost.localdomain (/etc/httpd/conf/sites-enabled/000-ispconfig.vhost:10) port 8080 namevhost localhost.localdomain (/etc/httpd/conf/sites-enabled/000-ispconfig.vhost:10) *:443 is a NameVirtualHost default server mydomain.com (/etc/httpd/conf.d/ssl.conf:81) port 443 namevhost mydomain.com (/etc/httpd/conf.d/ssl.conf:81) *:80 is a NameVirtualHost default server app.mydomain.com (/etc/httpd/conf/sites-enabled/100-app.mydomain.com.vhost:7) port 80 namevhost app.mydomain.com (/etc/httpd/conf/sites-enabled/100-app.mydomain.com.vhost:7) port 80 namevhost mydomain.com (/etc/httpd/conf/sites-enabled/100-mydomain.com.vhost:7) Syntax OK

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• Tomcat 5.5 - multiple contexts using same path

  - by ctn8iv

  Is it possible to set up multiple contexts using the same path? For example: <Context docBase="/www/websites/site1/java/base" path="/base" reloadable="true"/> <Context docBase="/www/websites/site2/java/base" path="/base" reloadable="true"/> I have two sites that use the same path both running on the same server/IP. The sites use different virtual hosts and different ServerNames, but I have no control over the directory structure of the sites because they are maintained by a client. Until now, they have been content with only allowing one site to run at a time, but this is a major hassle, so I need to know if there's a workaround.

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• .htaccess redirect to error page if port is not 80

  - by Momo

  I'm running a portable server through usb stick. The thing is I also have WAMP installed in my local machine and Apache somehow gets started on windows startup, because of some random reason which I don't recall now and it can't be changed. I want to prepare my portable server in situations like this, so closing httpd.exe from process and starting my portable server is not an option. Anyway, because of already active httpd.exe my portable server's WordPress site can only be accessed through localhost:81 - this is a problem as WP site is very dependent on the URL and I don't want to include the url with port on WP database. Here is what I want to do through .htaccess: On any path except for error.php file check if not port 80 If not port 80 redirect to /error.php?code=port It it possible for it to have priority over WP redirection or URL handling? In the error.php I provided info on how to manually close httpd.exe and such so my family and friends can access the portable site. It's sort of like a gallery and calender application for events and other such stuff... Please help? I'm I can't figure it out at all. I know others may not have apache already running, but I want to prepare for such a situation. Something like the following, but the following doesn't work. # BEGIN WordPress <IfModule mod_rewrite.c> <If "%{SERVER_PORT} = 80"> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </If> <Else> RewriteEngine On RewriteRule ^(error.php)($|/) - [L] RewriteRule ^(.*)$ /error.php?code=port [L] </Else> </IfModule> # END WordPress By the way, the portable server Server2Go automatically generates vhosts based o the hostname set on it's config file and changes ports if the port (e.g. 80) is already open.

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• Apache won't follow Symlink

  - by Marvin Dickhaus

  I have a LAMP server (Ubuntu 12.10) setup on my development machine. It is a T60 modified with an SSD. The server base is in /var/www. Apache has the following config: DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews SymLinksIfOwnerMatch AllowOverride all Order allow,deny allow from all </Directory> I'm currently developing a SilverStripe CMS featured site. The folder for the server is /var/www/sfk/. The framework and all cms relavant features are in their respective folders. The only folder that need to be modified would be the /var/www/sfk/mysite folder. Because of that I want to keep the mysite folder under my home directory and symlink it into the server folder. So here is what I've done: ln -s ~/sfk/mysite/ /var/www/sfk/ sudo chgrp www-data /var/www/sfk/mysite -R ls tells me the following: /var/www/sfk (exerpt) drwxr-xr-x 3 marvin www-data 4096 Nov 16 16:53 assets drwxr-xr-x 12 marvin www-data 4096 Nov 16 16:53 cms drwxr-xr-x 29 marvin www-data 4096 Nov 16 16:53 framework -rw-r--r-- 1 marvin www-data 2410 Nov 16 16:53 index.php lrwxrwxrwx 1 marvin www-data 24 Nov 20 17:45 mysite -> /home/marvin/sfk/mysite/ -rw-rw-r-- 1 marvin www-data 514 Nov 16 16:55 _ss_environment.php drwxr-xr-x 4 marvin www-data 4096 Nov 16 16:53 themes and ls /var/www/sfk/mysite/ drwxrwxr-x 6 marvin www-data 4096 Nov 16 00:15 code drwxrwxr-x 2 marvin www-data 4096 Nov 16 11:51 _config -rwxrwxr-x 1 marvin www-data 2685 Nov 16 15:39 _config.php drwxrwxr-x 2 marvin www-data 4096 Nov 16 00:15 css drwxrwxr-x 2 marvin www-data 4096 Nov 16 00:15 images drwxrwxr-x 2 marvin www-data 4096 Nov 16 00:15 javascript drwxrwxr-x 5 marvin www-data 4096 Nov 16 00:15 templates This is literally the same setup I have on my desktop machine. The problem I have is that the mysite/ folder is just not recognized. I'm thankful for every advice I get. I'm frustrated because I'm stuck with this issue for hours.

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• Securing php on a shared apache

  - by Jack

  I'm going to install apache+php in a server where two users, A and B, will deploy their website. I'm trying to achieve isolation of users' space for security reasons: that is no scripts from site A should be able to read files in site B. To achieve this I installed suphp. Website files of user A are owned by A:A with perm=700 and user of B are owned by B:B with perm=700. Suphp works great, but apache complains about permissions to read .htaccess. How can I let apache to read .htaccess in every dir of A and B while keeping isolation between site A and site B? I played with ownership (group = www-data) and permissions (750) but I found no way to keep isolation granted. Any idea? Maybe by running apache as root, but in this case are there any drawbacks?

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• Apache httpd processes and PHP out of memory

  - by Ofri

  I have a VPS running apache-php-mysql on centos and a single drupal website installed. The VPS has 256MB of RAM (could be the root cause of all my problems... maybe I just need more). Whenever I try to open my website from multiple browser tabs (about 8... not 800) all at once, apache crashes! I have this on the log: [Wed Oct 24 11:26:31 2012] [error] [client xxx] PHP Fatal error: Out of memory (allocated 28049408) (tried to allocate 201335 bytes) in xxx on line 2139, referer: xxx I have read many many posts here, but I think there is something fundamental that I'm missing - If I understand correctly some php script tried to allocate 200K after allocating 28MB, and fails to do so. First question is: should this cause the apache to crash??? Next, I tried to look at 'top' command while I do my little test. Indeed I see 7 httpd processes, each reserving about 30MB - which explains why my RAM runs out. How do I prevent apache from creating new processes until it's out of memory? I tried configuring /etc/httpd/conf/httpd.conf like this: <IfModule prefork.c> StartServers 1 MinSpareServers 1 MaxSpareServers 1 ServerLimit 1 MaxClients 1 MaxRequestsPerChild 100 </IfModule> But got the same exact result! What am I missing? Thanks a lot!

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• Having Troubles Getting My Apache Server Online(NodeJS and Apache)

  - by Jeff Armingol

  I am new here. This is my situation. I am using nodejs modules, serialport2 and socket.io, because I am trying to forward the data from my arduino hardware through serialports. In my server side script, I read the data then forward it to the client side. Now I am using Apache to serve the html page,which is the client side. I am running Nodejs on port 8000 and Apache on port 80. It is running OKAY when I view it in my browser typing localhost:80. The data is appearing and seems fine. Now when I tried to get my Apache server online using a Free DDNS provider(http://www.noip.com/) and my port80, it loaded the webpage but there are no data appearing on the page. What seems to be the problem here? Really need your expertise and advice. Thanks in advanced!

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• Apache permission Problems

  - by swg1cor14

  Ok all my files and folders are set as owner of vsftpd:nogroup. FTP program can upload and create and do everything. But when I use the PHP command mkdir, I get a Permission Denied even though the folder its creating it in is set to chmod 777. IF i set the base folder to user www-data and group www-data, PHP mkdir will work. However, I can't use FTP to delete or upload to that folder. /uploads is base folder. I use PHP mkdir to create a directory in there: if (!is_dir($_SERVER['DOCUMENT_ROOT'] . "/uploads/" . $_REQUEST['clientID'] . '/video/')) { @mkdir($_SERVER['DOCUMENT_ROOT'] . "/uploads/" . $_REQUEST['clientID'] . '/video/', 0777); } If /uploads is vsftpd:nogroup then PHP mkdir will give a Permission Denied error. If /uploads is www-data:www-data then PHP mkdir WILL work, but I cant continue to FTP anything in that folder that was just created. If /uploads is vsftpd:www-data then PHP mkdir will give a Permission Denied error. How can I create a directory with PHP and still be able to access it via FTP?

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• Unable to login through varnish cache

  - by ArunS

  I am setting up Active Collab Site in my new server. The setup is like below Internet --- varnish ---- apache But i am not able to login to the site through varnish cache.. But i can login to site through apache. Here is my VCL file backend default { .host = "localhost"; .port = "8080"; } acl purge { "localhost"; } sub vcl_recv { if (req.request == "PURGE") { if (!client.ip ~ purge) { error 405 "Not allowed."; } return(lookup); } if (req.url ~ "^/$") { unset req.http.cookie; } } sub vcl_hit { if (req.request == "PURGE") { set obj.ttl = 0s; error 200 "Purged."; } } sub vcl_miss { if (req.request == "PURGE") { error 404 "Not in cache."; } if (!(req.url ~ "wp-(login|admin)")) { unset req.http.cookie; } if (req.url ~ "^/[^?]+.(jpeg|jpg|png|gif|ico|js|css|txt|gz|zip|lzma|bz2|tgz|tbz|html|htm)(\?.|)$") { unset req.http.cookie; set req.url = regsub(req.url, "\?.$", ""); } if (req.url ~ "^/$") { unset req.http.cookie; } } sub vcl_fetch { if (req.url ~ "^/$") { unset beresp.http.set-cookie; } if (!(req.url ~ "wp-(login|admin)")) { unset beresp.http.set-cookie; }} When i try to login through varnish i was redirect back to login page. If i enter wrong password, then it will ask for enter correct password.

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• apxs cannot install mod_cloudflare on centos

  - by Adam

  [ Linux - CentOS - Apache 2.2 - mod_cloudflare - apxs2 ] I have changed my nameservers to point to CloudFlare. The problem is that all the IP addresses are coming in as CloudFlare's. This is no good, because I have to monitor and block some specific traffic. mod_cloudflare is supposed to resolve this but I have been unable to get this installed. The command in the documentation uses apxs2. I can't figure out how to install this, or if it just means for 'apache 2.4'. I'm running 2.2.3, and I can use 'apxs'. When I run: apxs -aic mod_cloudflare.c I get the error apxs:Error: Command failed with rc=65536 Does this mean I need apxs2 or something else? How do I get mod_cloudflare working on my server? I appreciate any help, the documentation is vague and limited.

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• "Directory index forbidden by Options directive" when deleting or renaming folders through webdav

  - by sandwiches

  I am trying to delete folders through webdav but all I get is 403 on the client and "Directory index forbidden by Options directive" in the Apache error log. I enabled "options indexes" for the folder and I stopped getting the errors in either the client or the log, but I still can't rename or delete folders through webdav. Any ideas why I'm unable to edit folders through webdav? I am running WAMP, default installation with Apache 2.2.17. I can connect, create files, delete files, rename them, etc. I can create folders but not delete them or rename them, once they're created. On the access log, whenever I try to delete, I get this: "DELETE /uploads/shahs HTTP/1.1" 301 243 On the error log, I get: Directory index forbidden by Options directive: The Webdav client gives a 403 when trying to delete or rename folders. Once, I added "options indexes," I stopped getting the error message in the Apache error log and the 403 on the webdav client, but now, deleting or renaming does nothing. No error messages, but nothing happens, at all.

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• OPTIONS request vs GET in Ajax

  - by user41172

  I have a PHP/javascript app that queries and returns info using an ajax request. On every server I've used so far, this works as expected, passing an Ajax GET request to the server and returning json data. On a new install, the query fails and returns nothing-- I inspected the request and it turns out that rather than passing the query as a GET, the server is passing it as an OPTIONS request. Is there any reason for this? I have no idea why this might happen. THanks!

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• For enabling SSL for a single domain on a server with muliple vhosts, will this configuration work?

  - by user1322092

  I just purchased an SSL certificate to secure/enable only ONE domain on a server with multiple vhosts. I plan on configuring as shown below (non SNI). In addition, I still want to access phpMyAdmin, securely, via my server's IP address. Will the below configuration work? I have only one shot to get this working in production. Are there any redundant settings? ---apache ssl.conf file--- Listen 443 SSLCertificateFile /home/web/certs/domain1.public.crt SSLCertificateKeyFile /home/web/certs/domain1.private.key SSLCertificateChainFile /home/web/certs/domain1.intermediate.crt ---apache httpd.conf file---- ... DocumentRoot "/var/www/html" #currently exists ... NameVirtualHost *:443 #new - is this really needed if "Listen 443" is in ssl.conf??? ... #below vhost currently exists, the domain I wish t enable SSL) <VirtualHost *:80> ServerAdmin [email protected] ServerName domain1.com ServerAlias 173.XXX.XXX.XXX DocumentRoot /home/web/public_html/domain1.com/public </VirtualHost> #below vhost currently exists. <VirtualHost *:80> ServerName domain2.com ServerAlias www.domain2.com DocumentRoot /home/web/public_html/domain2.com/public </VirtualHost> #new -I plan on adding this vhost block to enable ssl for domain1.com! <VirtualHost *:443> ServerAdmin [email protected] ServerName www.domain1.com ServerAlias 173.203.127.20 SSLEngine on SSLProtocol all SSLCertificateFile /home/web/certs/domain1.public.crt SSLCertificateKeyFile /home/web/certs/domain1.private.key SSLCACertificateFile /home/web/certs/domain1.intermediate.crt DocumentRoot /home/web/public_html/domain1.com/public </VirtualHost> As previously mentioned, I want to be able to access phpmyadmin via "https://173.XXX.XXX.XXX/hiddenfolder/phpmyadmin" which is stored under "var/www/html/hiddenfolder"

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• Running NginX (with Apache) and cPanel/WHM

  - by ub3rst4r

  I was wondering if its a good idea to be running NginX as the webserver (on port 80) and Apache as the reverse proxy (on port 8080) with cPanel/WHM being used as a control panel? I also installed Nginx Admin so the configuration for NginX is managed by WHM. The reason I am asking is because I came across an article (http://kbeezie.com/view/apache-with-nginx/) which explains how to setup Apache as a reverse proxy but it states If you are using a control panel based hosting such as cpanel/whm, this method is not advised. Most of the servers configuration is handled automatically in those cases, and making manual changes will likely lead to problems (plus you won’t get support from the control panel makers or your hosting provider in most cases). Anyone have any past experiences with this and can say if its good/bad idea?

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• Is it possible to rewrite some query strings to HTTPS and keep everything else on HTTP?

  - by Matt

  I'm rewriting query strings to pretty URIs, example: index.php?q=/en/contact becomes /en/contact and all works nicely.. # httpd.conf # HANDLE THE QUERY RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?q=$1 [L,QSA] Is it even possible to rewrite single queries to force https and force everything else onto http? I've tried many different approaches that typically end in infinate loops. I could write a plugin to do this in PHP but figured it would be more effecient to handle this in the server conf. I'd be greatful for any advice. EDIT: To clarify, I'd like to be able to rewrite the non SSL http://example.com/index.php?q=/en/contact to the SSL enabled https://example.com/en/contact and every query that is not /en/contact get written to http://example.com/...

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• Setting up httpd-vhosts.conf for multiple virtual hosts

  - by Chris Sobolewski

  I have a simple test setup using xampp at home, and I am getting really weird behavior when I attempt to set up multiple virtual hosts on this box. Here is my vhosts file: NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin [email protected] ServerName foo DocumentRoot "D:\wamp\xampp\htdocs\foo" ErrorLog logs/foo-error_log CustomLog logs/foo-access_log common <Directory "D:\wamp\xampp\htdocs\foo"> Options Indexes FollowSymLinks Includes execCGI AllowOverride All Order Allow,Deny Allow From All </Directory> </VirtualHost> <VirtualHost *:80> ServerAdmin [email protected] ServerName bar DocumentRoot "D:\wamp\xampp\htdocs\bar" ErrorLog logs/bar-error_log CustomLog logs/bar-access_log common <Directory "D:\wamp\xampp\htdocs\bar"> Options Indexes FollowSymLinks Includes execCGI AllowOverride All Order Allow,Deny Allow From All </Directory> </VirtualHost> When I attempt to run visit the first site, it works as expected. When I attempt to run the second site, I get a weird hybrid mishmash of both sites. It's the weirdest thing.

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• Display maintenance site to requesters based on their IP address

  - by user64294

  Hi all. I would like to set a special configuration in our apache web server. I would like to display sites to the users according to their IP addresses. We plan to upgrade our web sites. During the upgrade we'll put a maintenance site: so all the users which will connect to our web sites will get this site. There are 200 websites affected by the upgrade, so I don't want to change apache settings for each one. In order to test the upgrade i need to set apache to let only my IP address to access to asked site. If my IP address is a.b.c.d and if i ask for test.com i want to see it. but all other users, having a different IP address, should get the maintenane site even if they look for test.com. Our webserver is hosted out of the office (ovh.com france). The testers are the developers at our office and me. We can take some sites and enable them for test in which we implement IP restrictions in each website: the idea is on these websites, if the visitor's IP address is different from our office IP address we redirect this visitor to our maintenance website else we display the website. Is there a way to do this? Thank you.

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• How to block a user in apache httpd server from accessing a *.php file inside a Directory, instead user should access this using Directory name

  - by Oxi

  My requirement looks Simple, But Googling Did not help me yet. my query is i want to Throw a 404 page to a user(Not Re-Direct to another folder or file), who is trying to Access *.php files in my website ex: when a client asks for www.example.com/home/ i want to show the content , but when user says www.example.com/home/index.php i want to show a 404 page. i tried different methods, nothing worked for me, one of which tried is shown below <Directory "C:/xampp/htdocs/*"> <FilesMatch "^\.php"> Order Deny,Allow Deny from all ErrorDocument 403 /test/404/ ErrorDocument 404 /test/404/ </FilesMatch> </Directory> Thanks in Advance

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• DNS Issue- Nameserver Issue

  - by Master-Man

  I setup new server on centos 5.3 and configure dns and hostnam using WHM. I also register my new nameservers with my domain registrar with ns1.example.com and ns2.example.com. But i am unable to ping hostname and NS. ping pc2.example.com or ping ns1.example.com I received the below email from server. IMPORTANT: Do not ignore this email. Your hostname (pc2.example.com) could not be resolved to an IP address. This means that /etc/hosts is not set up correctly, and/or there is no dns entry for pc2.example.com. Please be sure that the contents of /etc/hosts are configured correctly, and also that there is a correct 'A' entry for the domain in the zone file. Some or all of these problems can be caused by /etc/resolv.conf being setup incorrectly. Please check that file if you believe everything else is correct. You may be able to automatically correct this problem by using the 'Add an A entry for your hostname' option under 'Dns Functions' in your Web Host Manager. When I issue the command root@pc[~]# host pc2.example.com I receive the below error that Host pc2.example.com not found: 3(NXDOMAIN) I added A entries for hostname and Nameservers but nothing replies. Its almost more than 72 hours for setting & registering nameservers and dns configurations. thanks,

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• How to enable hotlink protection without hardcoding my domain in the Apache config file?

  - by Jeff

  Been surfing around for a solution for a couple days now. How do I enable Apache hotlink protection without hardcoding my domain in the config file so I can port the code to my other domains without having to update the config file every time? This is what I have so far: RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://www\.example\.com [NC] RewriteRule \.(gif|ico|jpe|jpeg|jpg|png)$ - [NC,F,L] ... And this is what Apache suggests: SetEnvIf Referer example\.com localreferer <FilesMatch \.(jpg|png|gif)$> Order deny,allow Deny from all Allow from env=localreferer </FilesMatch> ... both of which hardcode the domain in their rules. The closest I came to finding any info that covers this is right here on ServerFault, but the conclusion was that it cannot be done. Based on my research, that appears to be true, but I didn't find any questions or commentary dedicated soley to this question. If anyone's curious, here is the link to the Apache 2 docs that cover this topic. Note that Apache variables (e.g. %{HTTP_REFERER}) can only be used in the RewriteCond text-string and the RewriteRule substitution arguments.

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• Mechanism behind user forwarding in ScriptAliasMatch

  - by jolivier

  I am following this tutorial to setup gitolite and at some point the following ScriptAliasMatch is used: ScriptAliasMatch \ "(?x)^/(.*/(HEAD | \ info/refs | \ objects/(info/[^/]+ | \ [0-9a-f]{2}/[0-9a-f]{38} | \ pack/pack-[0-9a-f]{40}\.(pack|idx)) | \ git-(upload|receive)-pack))$" \ /var/www/bin/gitolite-suexec-wrapper.sh/$1 And the target script starts with USER=$1 So I am guessing this is used to forward the user name from apache to the suexec script (which indeed requires it). But I cannot see how this is done. The ScriptAliasMatch documentation makes me think that the /$1 will be replaced by the first matching group of the regexp before it. For me it captures from (?x)^/(.* to ))$ so there is nothing about a user here. My underlying problem is that USER is empty in my script so I get no authorizations in gitolite. I give my username to apache via a basic authentication: <Location /> # Crowd auth AuthType Basic AuthName "Git repositories" ... Require valid-user </Location> defined just under the previous ScriptAliasMatch. So I am really wondering how this is supposed to work and what part of the mechanism I missed so that I don't retrieve the user in my script.

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• When to use Nginx PHP Fast CGI with a TCP socket instead of a UNIX socket?

  - by user64204

  I've followed this guide to setup PHP in FastCGI mode with Nginx. This guide describes 2 ways of doing it: TCP socket and UNIX socket. I've ran some Apache Benchmark on my locale machine and here are the results: Below tests ran multiple times to get better average statistics: $ ab -c 200 -n 100000 http://.... APACHE: 1800 req/sec NGINX (TCP socket): 2500 req/sec NGINX (UNIX socket): 15000 req/sec As far as I understand, there is overhead with using a TCP socket rather than a UNIX socket, hence the better performance with the latter. However I was not expecting such a performance difference given that the TCP socket is on the localhost, and therefore would like to ask the following question: Q: Given the huge performance gain with using a UNIX socket, what are the configuration scenarios where it would make sense to use a TCP socket instead?

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• PHP displays blank white page even with all error reporting enabled

  - by Andy Shinn

  I am trying to debug a broken page in a Drupal application and am having a hard time getting PHP to spit anything useful out. I have the following set: error_reporting = E_ALL display_errors = On display_startup_errors = On log_errors = On error_log = /var/log/php/php_error.log I have a file showing me phpinfo() which confirms these variables are set correctly for the environment. I have increased memory_limit to 256M (which should be more than enough). Yet, the only indication I get is a status 500 code in the apache access log and a blank white page from PHP. The Apache virtual host has LogLevel set to debug and the error log only outputs: [Sat Jun 16 20:03:03 2012] [debug] mod_deflate.c(615): [client 173.8.175.217] Zlib: Compressed 0 to 2 : URL /index.php, referer: http://ec2-174-129-192-237.compute-1.amazonaws.com/admin/reports/updates [Sat Jun 16 20:03:03 2012] [error] [client 173.8.175.217] File does not exist: /var/www/favicon.ico [Sat Jun 16 20:03:03 2012] [debug] mod_deflate.c(615): [client 173.8.175.217] Zlib: Compressed 42 to 44 : URL /favicon.ico The PHP error log outputs nothing at all. kernel and syslog show nothing related to Apache or PHP. I have also tried installing suphp and checking its log just confirms the user is executing correctly: [Sat Jun 16 20:02:59 2012] [info] Executing "/var/www/index.php" as UID 1000, GID 1000 [Sat Jun 16 20:05:03 2012] [info] Executing "/var/www/index.php" as UID 1000, GID 1000 This is on Ubuntu 12.04 x86_64 with the following PHP modules: ii php5 5.3.10-1ubuntu3.1 server-side, HTML-embedded scripting language (metapackage) ii php5-cgi 5.3.10-1ubuntu3.1 server-side, HTML-embedded scripting language (CGI binary) ii php5-cli 5.3.10-1ubuntu3.1 command-line interpreter for the php5 scripting language ii php5-common 5.3.10-1ubuntu3.1 Common files for packages built from the php5 source ii php5-curl 5.3.10-1ubuntu3.1 CURL module for php5 ii php5-gd 5.3.10-1ubuntu3.1 GD module for php5 ii php5-mysql 5.3.10-1ubuntu3.1 MySQL module for php5 So, what am I missing here? Why no error reporting?

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• how to go about scaling a web-application ?

  - by phoenix24

  for someone whoes been primarily a web-application developer, and know not much about scaling/scalability techniques. I'll start by stating my application is written in Python, using Django; a fairly standard setup. I currently use Apache 2.2 for my webserver, and MySql for my database server; both running on the same vps server. Up until now, it was basically a prototype and merely 15-30 concurrent users at any given time; so I had no issues, but now since we'll be adding more users we'll have severe performance issues. So my question is how do i go about scaling my web-application? and my plan is as follows. Now I have just one vps server running, apache + mysql. Next, I plan to add another vps server, to run only MySql; so i'll have one web-server and one db server. Next, I'll add Memcache to the webserver for caching data; and taking some load off mysql. Next, another web-server for serving all the static content; Next, a vps server for load-balancing (nginx/varnish) behind which would be my two web-servers and then db-server. Does that sound like a workable strategy, please guide me around here.

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