Packet Forwarding Filters

Packet forwarding filters limit access to specific services by preventing selected data packets from being forwarded by the router. These filters provide the highest level of security because they examine each data packet forwarded by the router. The filtering is based on the following packet characteristics:

• Source interface
• Destination interface
• Source address
• Destination address
• Content

Packet forwarding filters do not restrict service advertisement packets sent by servers. Therefore, restricted users might see advertisements of services even when they cannot access the service.

Although packet forwarding filters provide the highest level of security, they might affect the performance of the router because the filters are applied to each data packet received by the router.

Packet forwarding filters are available for IPX and TCP/IP protocols.