Comma-separated list of networks that are to be accepted (+) or rejected (-).
Note: The plus-sign for accepted networks is optional.
      Note: Filtering by routing tags is unaffected, i.e. if a tag for a route indicates that it is not to be learned or propagated, then this cannot be forced by means of the filter table.
    - SNMP ID:
 - 2.8.8.7.2
 - Console path:
 - Setup > IP-Router > RIP > Filter
 - Possible values:
 Max. 64 characters from [0-9]+-,
- Default:
 - empty