Redirect domains without www (e.g. to with apache rewrite rules

Apache www redirect rule

If all your visitors shall access your website with a URL like 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

Change of mail header form field identifier from ISPConfig 2 to ISPConfig 3

If you have a local mail server installed and change your server controlpanel to ISPConfig 3, having used ISPConfig 2 in the past, you may have to change the value that defines the form field observed by all functions in need of the address that mails are supposed to be delivered to (catchalls, etc.) on ... Read more

Update to latest Spamassassin filter rules in ISPConfig 2

The ISPConfig 2 controlpanel installs its own copy of Spamassassin in the folder /home/admispconfig/ispconfig/tools/spamassassin . To update the Spamassassin filter rules in ISPConfig 2, run this command as root user: /home/admispconfig/ispconfig/tools/spamassassin/usr/bin/sa-update To test if Spamassassin works with the new ruleset, run this command: /home/admispconfig/ispconfig/tools/spamassassin/usr/bin/spamassassin --lint If it does not return an error message, then Spamassassin is ... Read more

Secure /tmp and /dev/shm directories in a OpenVZ enviroment

The /tmp and /dev/shm directories of a OpenVZ virtual machine shall be mounted without suid and exec permissions. To achieve this, create a a shell script on the host server for every virtual machine which contains the commands to remount the directories. This script will be started automatically by openvz when the VM is started. ... Read more

Apache webserver: redirect requests for to

Many webmasters want to redirect users that access their websites with "domain.tld" automatically to "www.domain.tld". If you use the Apache web server, you can do this by using Apache rewrite rules. Add a .htaccess file with the following content in the root directory of the website: RewriteEngine On RewriteCond %{HTTP_HOST} !^www\.domain\.com RewriteRule (.*)$1 [L,R=301] ... Read more

How to fix the spamassassin bug with the FH_DATE_PAST_20XX rule

Since january 1 2010, spamassassin is falsely marking non spam emails as spam due to an error in the regular expression of the FH_DATE_PAST_20XX rule. Description of the bug: To fix this, run the following command on the shell as root user: sa-update If you use the software ISPConfig 2 on your server, run ... Read more

How to reset the MySQL root password

The following steps describe the procedure to reset the mysql root password on Linux. 1) Stop the mysql server /etc/init.d/mysql stop 2) Start the mysql server manually without permission tables which allows us to login as root user without password: mysqld_safe --skip-grant-tables & 3) Login into mysql as root user without a password and switch ... Read more

How to use a custom php.ini with suphp

To use a custom php.ini file with SuPHP for a website, you can define the path to the php.ini file in a .htaccess file or in the apache vhost like this: suPHP_ConfigPath /home/websites/domain.tld/ Then add a php.ini file in the directory /home/websites/domain.tld/ which may be a copy of the global php.ini were you just changed ... Read more

Redirect a subdomain with apache mod_rewrite and keep the URL in the address bar

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 directives. RewriteEngine on RewriteCond %{HTTP_HOST} ^sub.domain.tld [NC] RewriteRule ^/(.*)$ /sub/$1 [L] This rewrite rule can be added into a .htaccess file in the website ... Read more