In this article we will show how to install mod_evasive and mod_security or mod_qos.

These modules protect Apache against DOS,DDOS or brute force attacks on Linux Ubuntu 10.04 or other debian based distributions.

Here is first an description on mod_evasive and mod_security.

What is mod_evasive?
mod_evasive is an evasive maneuvers module for Apache to provide evasive action in the event of an HTTP DoS or DDoS attack or brute force attack. It is also designed to be a detection and network management tool, and can be easily configured to talk to ipchains, firewalls, routers, and etcetera. mod_evasive presently reports abuses via email and syslog facilities.
Detection is performed by creating an internal dynamic hash table of IP Addresses and URIs, and denying any single IP address from any of the following: Continue reading →