16.9. Prefix List

Prefix Lists are an advanced filtering mechanism based on IP Address Range.

They can be found at Routing → Dynamic → Prefix List.

Each Prefix List must have a unique name and a list of IP Addresses/Ranges.

They are ordered by the Sequence number.

Action can either be set to Permit or Deny. A mix of both is possible in a Prefix List.

Minimum Mask is for a range of IP Ranges to be filtered. The prefix list will be applied if the prefix length is less than or equal to the le prefix length. This number must be bigger than the Network Mask.

Maximum Mask is for a range of IP Ranges to be filtered. The prefix list will be applied if the prefix length is greater than or equal to the ge prefix length. This number must be smaller than the Network Mask.

A Prefix List without the Minimum Mask or Maximum Mask is the same as an Access List.