Re: Access control and Accountability

Dave Crocker (
Fri, 10 Apr 87 12:45:47 PST

Newsgroups: mod.protocols.tcp-ip
Subject: Re: Access control and accountability
References: <>
Reply-To: Reply-To: dcrocker@ubvax.UUCP (Dave Crocker)
Distribution: world
Organization: Ungermann-Bass, Inc., Santa Clara, Ca.

In article <>
            hedrick@TOPAZ.RUTGERS.EDU (Charles Hedrick) writes:
>... You will need to insert the access control in
>sendmail also. We have done all of this stuff in the past, but are
>not doing it now. It is nearly impossible to control mail. There are
>now so many gateways, that you can always find some machine on the
>local network that will forward your mail to the Arpanet for you. Not
>to mention UUCP or Bitnet to Arpanet gateways...

The MMDFII mail transport system, used by CSNet and distributed with
4.3BSD, has considerable path-filtering based security. You can
prohibit users, networks or hosts from sending to any specified host
or network.

While this requires a cooperating set of internal MMDF's to enforce
filtering pervasively, rather than simply at the boundaries, one would
assume that a security mechanism would not be used unless the requirement
were fairly severe.


P.S. You are correct that statistics gathering features are present in
      other vendors' IP Routers.

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