How to install mod_limits

How to install Apache mod_limits module on CentOS WebPanel?
This apache module is aimed at protecting the web server during attacks.

It provides a few, very usefull, functionalities:

* Limit the maximum number of simultaneous connections
* Limit the maximum number of simultaneous connections per Vhost
* Limit the maximum number of spawned processes with the same UID
* Do not serve request if the load is over certain value

Install development packages

yum install apr-devel apr-util-devel apr apr-util

Download and Install Apache mod_limits module 

cd /usr/local/src
wget https://github.com/hackman/mod_limits/archive/master.zip
unzip master.zip
cd mod_limits-master
/usr/local/apache/bin/apxs -a -i -c mod_limits.c

Add this configuration to file: /usr/local/apache/conf.d/mod_limits.conf

LoadModule limits_module modules/mod_limits.so
<IfModule mod_limits.c>
    LimitMaxConnsPerVhost 20
    LimitMaxConnsPerUid 20
    LimitMaxConnsPerIP 80
    LimitMaxLoadAVG 10
    CheckLoadInterval 5
</IfModule>

* Make custom changes based on the limits you want to have set.

Please note that ExtendedStatus needs to be set to On in
/usr/local/apache/conf/httpd.conf

At the end restart apache to load new changes

service httpd restart

Home page
https://github.com/hackman/mod_limits

Last testing done with apache 2.4.26.

Tagged: