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1 vote
Current Version
Last Release Date
Compatible With
  • Nagios 1.x
  • Nagios 2.x
  • Nagios 3.x
  • Nagios 4.x
  • Nagios XI
Network Monitoring Software - Download Nagios XI
Log Management Software - Nagios Log Server - Download
Netflow Analysis Software - Nagios Network Analyzer - Download
This plugin checks your Server for banned IPs by fail2ban.
### Installation
This plugin requires fail2ban and sudo installed. Also several commands must be runnable by nagios user with sudo, so add the following to visudo:

# Needed for check_fail2ban
nagios ALL=NOPASSWD: /usr/bin/fail2ban-client status
nagios ALL=NOPASSWD: /usr/bin/fail2ban-client status *
nagios ALL=NOPASSWD: /usr/bin/fail2ban-client get * banip
nagios ALL=NOPASSWD: /usr/bin/fail2ban-client get * banip --with-time
nagios ALL=NOPASSWD: /usr/bin/fail2ban-client get * bantime
### Usage
./check_fail2ban -h Display this message
-w defaults to 10
-c defaults to 20
-t Time: Display until when IPs will be banned
-j i.e. comma separated string of jails, i.e. ssh,postfix
Only check those jails
./check_fail2ban -t -w 5 -c 10 -j ssh,postfix
./check_fail2ban -t
Reviews (1)
H, thank you for this plugin,. It works great when I run it locally on the machine where Fail2Ban is running. But I cannot get it running remotely from the Nagios Server.

I tried to check it directly with adding "-H " to your command syntax as well as configure a remote NRPE call from Nagios Server to the server where Fail2Ban is running. But the result is still the same: "Error: fail2ban-client not found"

What do I do wrong? Thank you, Jakub