Internetwork zone name filtering with selective placebo zone nam

Details Internetwork zone name filtering with selective placebo zone nam Internetwork zone name filtering with selective placebo zone nam

1996-03-04

1998-12-01

Lall, Parshotam S.

Multiplex communications

Wide area network

Packet switching

39520053, 39520079, 370401, 3408258, G06F 1516

Patent

active

058450874

ABSTRACT:
A zone filtering method and apparatus, finding particular utility in an AppleTalk (trademark of Apple Computing, Inc.) internetwork, is disclosed. A network manager is able to hide zones and respective Network Visible Entities (NVE's) from nodes (routers and workstations) on branches of the AppleTalk internetwork through the use of zone filters. These nodes are thus unable to initiate communication with NVE's within the hidden zones. A zone filter is a list of zone names and an indication of whether access to the listed zones is permitted or denied. The port to which a zone filter is attached identifies which branch of the AppleTalk internetwork the zone filter applies to. A router according to the invention is capable of recognizing specific datagrams to which the zone filter is applied.

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G. Sidhu et al., Inside AppleTalk.RTM., 2nd ed., Chapter 5 pp. 5-1 thru 5-26, Chapter 7 pp. 7-1 thru 7-17 and Chapter 8 pp. 8-1 thru 8-25, (1990).
Routing AppleTalk, Cisco Systems, Inc. Manual, Chapter 10 pp. 10-1 thru 10-89, (undated).

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