Filter Types; Data Filters; Advertisement Filters - 3Com OfficeConnect Remote 812 Cli User's Manual

Filter Types

Data Filters

Advertisement Filters

Input data - filter packets as they enter.


Output data - filter packets as they exit.


Embedded bypass for periodic router protocol packets (IP RIP, IPX RIP and IPX


SAP)
Each filter class can be identified further by the following types:
Filters can be classified by the following types:
Data filters - based on protocol-specific packet information.


Advertisement filters - based on broadcast packet information (IP RIP, IPX


RIP, and IPX SAP).
Generic filters - based on packet structure.


Data filters control network access based on the protocol, source / destination
address, and port designation (e.g., TCP and UDP port designations) of the packet.
The following table describes the data filters supported.
Table 6-1 Data Filters
Filter Action
IP Controls network access based on the protocol and source/destination address.
IP filter rules allow filtering based on the source address, destination address,
protocol type, source port, and port designation of the IP packet.
IPX Controls network access based on the protocol and source/destination network.
IPX filter rules allow filtering based on the source network, destination network,
protocol type, source socket, destination socket, source node, and node
designation of the IPX packet.
Bridge Controls network access based on the source and destination MAC addresses.
Advertisement filters operate on network protocol packets that contain varying
information such as SAP or RIP. Filtering of these packets is performed by the
specific protocol process. The following table describes the advertisement filters
supported:
.
Table 0-1 Advertisement Filters
Filter Action
IP-RIP Controls the content of IP Routing Information Protocol (RIP) packets that are
sent out or received on specific ports. The IP RIP filtering process filters addresses
from the RIP packet upon transmission, and does not enter routes into the
routing table upon receipt.
IPX-SAP Controls the content of Service Advertising Protocol (SAP) packets that are sent
out or received on specific ports. The IPX-SAP filter rules allow filtering on service
type, server name, network address, node address, and socket number fields of
the service entry. The forwarding process uses the filter information to prevent
the service information from being included in the SAP packet.
IPX-RIP Controls the content IPX RIP packets that are sent out or received on specific
ports. The IPX RIP filtering process filters addresses from the RIP packet upon
transmission, and does not enter routes into the routing table upon receipt.
OfficeConnect Remote 812 Filtering Capabilities 6-27