Netopia R5100, R5300, R5200 manual Sample IP filter set, Modifying filter sets

Security 13-19

Modifying filter sets

To modify a filter set, select Display/Change Filter Set in the Filter Sets screen to display a list of filter sets.

Select a filter set from the list and press Return. The Change Filter Set screen appears. The items in this screen are the same as the ones in the Add Filter screen (see “Adding filters to a filter set” on page 13-14).

Display/Change Filter Set...

Filter Set Name: Filter Set 1

Add Input Filter to Filter Set...

Display/Change Input Filter...

Delete Input Filter...

Move Input Filter...

Add Output Filter to Filter Set...

Display/Change Output Filter...

Delete Output Filter...

Move Output Filter...

Deleting a filter set

Note: If you delete a filter set, all of the filters it contains are deleted as well. To reuse any of these filters in another set, before deleting the current filter set you’ll have to note their configuration and then recreate them.

To delete a filter set, select Delete Filter Set in the Filter Sets screen to display a list of filter sets.

Select a filter set from the list and press Return to delete it. Press Escape to exit the list without deleting the filter set.

A sample IP filter set

This section contains the settings for a filter set called Basic Firewall, which is part of the Netopia R5000 Series Router’s factory configuration.

Basic Firewall blocks undesirable traffic originating from the WAN (in most cases, the Internet), but forwards all traffic originating from the LAN. It follows the conservative “that which is not expressly permitted is prohibited” approach: unless an incoming packet expressly matches one of the constituent input filters, it will not be forwarded to the LAN.