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From: ron@TOPAZ.RUTGERS.EDU (Ron Natalie)
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  Security and Access Restrictions
Message-ID: <8711081702.AA14650@topaz.rutgers.edu>
Date: Sun, 8-Nov-87 12:02:59 EST
Article-I.D.: topaz.8711081702.AA14650
Posted: Sun Nov  8 12:02:59 1987
Date-Received: Sat, 14-Nov-87 18:39:33 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 4

CISCO and other IP gateways have access control lists that allow you
to restrict which packets can go to which hosts passing through a gateway.
We use this primarily to keep students on our public terminal servers off
the arpanet.