Avaya Configuring Traffic Filters and Protocol Prioritization Manual do Utilizador descarregar pdf (Página 141)

303543-A Rev 00

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Appendix B

Examples and Implementation Notes

This appendix contains examples, hints, reminders, and important notes you may

find useful.

Traffic Filter Example for Basic IP Network Security

In a network configuration with a single leased or dial-up connection to the

Internet, one common use for traffic filters is to restrict external access to the

network without restricting outbound service for users.

This section provides a step-by-step example for creating an inbound IP traffic

filter to prevent access to a network through the well-known TCP and UDP ports.

The procedure assumes that you are working at a station that is running Site

Manager.

To further restrict access, you can create additional inbound IP traffic filters to

limit services to specific IP source and destination addresses. “Inbound Traffic

Filter Examples,” later in this appendix, provides an example of allowing only a

specified subset of Telnet, TFTP, and FTP users.

Topic Page

Traffic Filter Example for Basic IP Network Security

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Inbound Traffic Filter Examples B-3

Protocol Prioritization Examples B-7

Implementation Notes

• Filtering Outbound Frame Relay Traffic

• Filtering over a Dial Backup Line

• Using a Drop-All Filter as a Firewall

• Using Outbound Traffic Filters for LAN Protocols

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Avaya Configuring Traffic Filters and Protocol Prioritization Manual do Utilizador Página 141