Questions on making TCP/IP secure

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#419

From: dorenbos_s
Date: Fri, 01 Jun 1990 15:10

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What are the possibilities with a CISCO router to make your LAN secure, when
the CISCO is routing the TCP/IP protocol? For e.g. how can you forbid
connection from the WAN to the LAN and allow connections made from the LAN to
the WAN. How can you allow/forbid telnet sessions; allow/forbid ftp sessions;
allow/forbid mail etc. etc. Is it possible to allow ftp sessions initiated on
our LAN but at the same time forbid ftp sessions made on another LAN to our
LAN?
Please give the correct lines for the access-list(s) involved to do this sort
of things.

Marcel Dorenbos, PTT Research Neher Laboratorium, The Netherlands.

UUCP            : hp4nl!dnlunx!dorenbos
INTERnet        : DORENBOS%HLSDNL5@CUNYVM.CUNY.EDU
eMail           : MCM_Dorenbos@PTTRNL.NL

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcsun!hp4nl!dnlunx!dnlts!dorenbos_s
From: dorenbos_s@pttrnl.nl
Newsgroups: comp.dcom.sys.cisco
Subject: Questions on making TCP/IP secure
Message-ID: <33509.2666936f@pttrnl.nl>
Date: 1 Jun 90 15:10:22 GMT
Organization: PTT Research Neher Laboratories, The Netherlands
Lines: 15