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From: Mills@UDEL.EDU
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  What are martian filters?
Message-ID: <8708290144.aa19625@Huey.UDEL.EDU>
Date: Sat, 29-Aug-87 01:44:43 EDT
Article-I.D.: Huey.8708290144.aa19625
Posted: Sat Aug 29 01:44:43 1987
Date-Received: Sun, 30-Aug-87 06:55:55 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Doug,

A martian filter is designed to delete certain kinds of packet trash
at gateway interfaces between networks. Specifically, the trash consists
of "loopback" addresses 127.0.0.1 from malconfigured Unix hosts, "local
use" addresses (see latest Assigned Numbers RFCs) and broadcasts. See
RFC-1009 for further information.

Dave