fail2ban

Apache list of errors

In order to update/extend list of records to look for in apache log.
Searched by fail2ban update its config by adding list error with its code.

This way you enable jail2ban on your drupal sites, and also while doing it, create a drupal.log file via rsyslog deamon.

Drupal
Enable drupal syslog
drush en syslog

Add IP address to whitlist with fail2ban
Open config file

vim /etc/fail2ban/jail.conf

find a line
ingoreip =
add particular IP or subnet
Remember to keep a space between records

How to remove record from fail2ban database

Find chain/rule name with IP address
iptables -L -n

Find jailname
fail2ban-client status