# check_rbl_extension

Extension for the check_rbl plugin to check multiple IP addresses for entries in blacklists.
The check_rbl plugin can only check one IP adress for entries in blacklists, 
there is no option to check multipli IP adresses.

This plugin determines the public IP addresses of the server and uses the check rbl plugin to check each found IP for entries in blacklists.

## Requirements 

This plugin needs the check_rbl plugin.

## Monitoring States

The plugin works with three monitoring states:

- CRITICAL 
- UNKNOWN 
- OK

### CRTITICAL

Occurs if at least on IP is on a Blacklist.

### UNKNOWN

The main reasons for the state unknown should be problems in the execution of the script. Reached timeouts, 
wrong paramters or network Problems etc.
Note: The monitoring receives the state unknown only if the state occurs on every checked IP Adress. 

### OK 

Occurs If no IP is on a Blacklist.
