Novell NETWARE 6-DOCUMENTATION Manual page 1869

1
The Use of Filters
Understanding
This chapter describes the Filter Configuration utility (FILTCFG) that you use
to configure filters that selectively discard packets to be sent or received by a
router. Filters let you control the service and route information that is accepted
or advertised by a router.
Filters can be useful when you want to limit specific kinds of traffic to certain
parts of your network topology, or when you want to provide a certain level
of security.
®
The Novell Internet Access Server 4.1 routing software supports filtering to
control the service and route information that is accepted or advertised by a
router. Filters are useful when you want to limit specific types of traffic to
certain parts of your network and when you want to provide a certain level of
security. You use FILTCFG to configure the filters for the Internetwork
Packet Exchange
TM
bridge to selectively discard packets sent or received by a router. The
following types of filters are supported:
Packet forwarding —Prevents selected data packets from being
forwarded by the router. Packet forwarding filtering is available for IPX
and TCP/IP.
Service information —Limits the services added to the service
information (SAP) tables of specified routers. Service information
filtering is available for IPX and AppleTalk.
Routing information —Limits the routes added to the routing tables of
specified routers. Routing information (RIP) filtering is available for IPX,
AppleTalk, and TCP/IP.
(IPX ) protocol, IP, AppleTalk*, and the source route
TM
Understanding
9