OfficeConnect Remote 812 Filtering Capabilities 6-27

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:

Filter 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 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 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 0-1Advertisement 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.

 

 

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3Com 812 manual Ip-Rip, Ipx-Sap, Ipx-Rip