Adds Nginx DOS detection to Fail2ban

jail.local

# /etc/fail2ban/jail.local

# [...]

[nginx-dos]
# Based on apache-badbots but a simple IP check (any IP requesting more than
# 240 pages in 60 seconds, or 4p/s average, is suspicious)
# Block for two full days.
# @author Yannick Warnier
enabled = true
port    = http
filter  = nginx-dos
logpath = /srv/data-srv1/logs/nginx/*/*_access.log
findtime = 60
bantime  = 172800
maxretry = 240

nginx-dos.conf

# /etc/fail2ban/filter.d/nginx-dos.conf

# Fail2Ban configuration file
#
# Generated on Fri Jun 08 12:09:15 EST 2012 by BeezNest
#
# Author: Yannick Warnir
#
# $Revision: 1 $
#

[Definition]
# Option:  failregex
# Notes.:  Regexp to catch a generic call from an IP address.
# Values:  TEXT
#
failregex = ^<HOST> -.*"(GET|POST).*HTTP.*"$

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex =

thanks!

Hi,

I am using your configuration and i am seeing multiple failed attempts but nothing is getting blocked can you please help me fine tune the block policy.

Thanks,

I figured it out I had to add an action.

action = iptables[name=HTTP, port=http, protocol=tcp]

This worked

it bans but doesn't block on iptables. what should I do?

Status for the jail: nginx-dos
|- Filter
|  |- Currently failed:	10
|  |- Total failed:	211
|  `- File list:	/opt/nginx/logs/access.log
`- Actions
   |- Currently banned:	1
   |- Total banned:	1