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A small plugin to check the number of tcp connections by state.
Current Version
1.1
Last Release Date
2017-01-17
Owner
Adrian Drexler
License
GPL
Compatible With
check_tcp_connections_v1.1
Successfull tested with Raspberry Pi 1 Model B, Nagios 4 + NagiosGraph and Raspbian (Debian).
Usage: ./check_tcp_connections -s [a|l|w|e] -w <con> -c <con> Only one state !!! -s state: a:all, l:listen, w:wait, e:established
Update 1.1: - New state added: s:syn (perfect to detect SYN-Flooding) - netstat don't resolve names
Installation ============ 1. Put the plugin into your plugin-directory. 2. Dont forget to set the permissions of the file to 755 on your linux machine. Also you need netstat. 3. At commands.cfg add the following lines: define command { command_name check_tcp_connections command_line $USER1$/check_tcp_connections -s $ARG1$ -w $ARG2$ -c $ARG3$ } Now you are ready to define your own service with "check_command check_tcp_connections!a!30!50" or other values.
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