Netopia 2200 series Software User's Manual page 175

Policy-based Routing using Filtersets
configure one filter to match the first type of packet and apply Force Routing. A
subsequent filter is required to match and forward all other packets.
Management IP traffic
If the Force Routing filter is applied to source IP addresses, it may inadvert-
ently block communication with the router itself. You can avoid this by preced-
ing the Force Routing filter with a filter that matches the destination IP
address of the Gateway itself.
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