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Nagios RBL / DNSBL Check

A Python-based Nagios/Icinga plugin to check whether a host is listed on any known DNS-based spam blacklists.

Requirements

The plugin requires Python version 2.6 or higher. If you are using a system with more than one version of Python installed, edit the first line of the check_rbl.py script to point to the locally-installed version of Python you wish to use. On RHEL systems, for example, this might look like:

#! /usr/bin/env python26

The Python library for IPv4/IPv6 manipulation is required (included in Python 3.3 and later). You can install it using pip:

pip install ipaddress

Or download it using a package manager, it's usually referred as python-ipaddress

Usage

You can run the plugin using either a hostname (which will be resolved to an IP address) or an IP address:

./check_rbl.py -w <WARN level> -c <CRIT level> -h <hostname>
./check_rbl.py -w <WARN level> -c <CRIT level> -a <ipv4 address>
./check_rbl.py -w <WARN level> -c <CRIT level> -a <ipv6 address>

For example, to test whether hostname mail.google.com is listed on any known blacklist, with a Warning level of 1 blacklist and a Critical level of 3 blacklists, do:

./check_rbl.py -w 1 -c 3 -h mail.google.com

To test the plugin, check 127.0.0.2 or ::FFFF:7F00:2 which should always come back as "listed" on every known blacklist. For example:

./check_rbl.py -w 1 -c 3 -a 127.0.0.2
./check_rbl.py -w 1 -c 3 -a ::FFFF:7F00:2

Known Blacklists

A list of known blacklists included in the check_rbl.py script is located on this Wiki page:

https://github.com/egeland/nagios-rbl-check/wiki

If you know of other DNS-based blacklists that should be considered for inclusion, please open an "Enhancement" issue.

Contributors

License

Licensed under the GPL v3. Enjoy.

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Icinga/Nagios spam blacklist check, written in python

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