The /etc/hosts file on a Linux system is a critical configuration file that maps hostnames to IP addresses. This file allows a user to manually associate specific IP addresses with domain names, effectively bypassing the DNS (Domain Name System) lookup process for these entries. The file typically contains lines of text where each line represents ... Read more
php_admin_value and php_value are directives used in PHP-FPM (FastCGI Process Manager) configuration, often seen in context with web server setups like Apache or Nginx. They are used to set values for PHP's configuration directives e.g. in a PHP-FPM pool file or in the Apache server configuration. This is an alternative to changing PHP settings in ... Read more
The Nginx web server has a max. body size limit of 1 MB for requests as default. This might be too low for file uploads in scripts and you will see the following error message when you try to upload a file: 413 Request Entity Too Large The configuration variable for this option is "client_max_body_size" ... Read more
Have you ever looked in the apache config files to see where a website's virtual host is defined? The apache2ctl script has a useful option that could come in good here. When you execute the command, it should look like this: apache2ctl -S You'll obtain a list of all virtual hosts and default servers in ... Read more
Hint: The procedure that is described below is for ISPConfig versions < 3.0.3. For newer ispconfig versions, use the builtin ssl certificate creation function of the ispconfig updater instead. The steps below should only be used to manually create a new SSL certificate in case that you can not run the updater on your installation. The ... Read more
HTTP connections can be redirected to HTTPS using the apache mod_rewrite module. Mod_rewrite should be available in every apache installation. Apache HTTP to HTTPS Redirect Create a file with the name .htaccess in the website root directory which contains the following lines: RewriteEngine On RewriteCond %{HTTPS} off RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} If you use ISPConfig 3, ... Read more
This tutorial shows you how to use redirect rules in the Apache web server. If you want to redirect a subdomain like sub.domain.tld into a subdirectory of the website and keep the original URL in the browser location bar, you may use the following apache directive. RewriteEngine on RewriteCond %{HTTP_HOST} ^sub.domain.tld [NC] RewriteRule ^/(.*)$ /sub/$1 ... Read more
If all your visitors shall access your website with a URL like www.domain.com and not without www, use the following apache rewrite rule for redirecting them. RewriteEngine On RewriteCond %{HTTP_HOST} !^www RewriteRule (.*) http://www.%{HTTP_HOST}$1 [L,R] The apache rewrite rule can be added in a .htaccess file in the website root directory or if you use ... Read more
The Webalizer package in Debian 6 has currently small bug as the required package for the GeoIP database is not installed automatically when Webalizer is installed. The symptoms are that Webalizer statistics was not created and this error message is displayed when Webalizer is run: Error Opening file /usr/share/GeoIP/GeoIP.dat The solution is to install the ... Read more
If you use mod_security on your server you might encounter that a website script is not compatible with mod_security. To disable mod_security (v2) for a website, add the following code into the apache directives field: <IfModule mod_security2.c> SecRuleEngine Off </IfModule> For the older mod_security 1 version, use these configuration directives: <IfModule mod_security.c> SecFilterEngine Off </IfModule> ... Read more