From owner-freebsd-questions Sun Sep 1 17:29:18 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id RAA01541 for questions-outgoing; Sun, 1 Sep 1996 17:29:18 -0700 (PDT) Received: from relay.hp.com (relay.hp.com [15.255.152.2]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id RAA01536 for ; Sun, 1 Sep 1996 17:29:07 -0700 (PDT) Received: from hpautobo.aus.hp.com by relay.hp.com with ESMTP (1.37.109.16/15.5+ECS 3.3) id AA104694143; Sun, 1 Sep 1996 17:29:05 -0700 Message-Id: <199609020029.AA104694143@relay.hp.com> Received: by hpautobo.aus.hp.com (1.37.109.16/16.2) id AA180784142; Mon, 2 Sep 1996 10:29:02 +1000 From: M C Wong Subject: Anyway to check firewall access ? To: questions@freebsd.org Date: Mon, 2 Sep 96 10:29:01 EST Mailer: Elm [revision: 70.85] Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk I have a friend living overseas who relies on telnet and other services to communicate with me in his office. Email is NOT available for some reason. He is using a PC, and only application he can relies on is telnet, which he uses to login to my machine and initiate talk. No WinTalk etc available. Recently, his site admin configure the Cisco box to block all outgoing telnet traffic meaning we can NO longer keep in touch. My question is, is there a way of finding out the permitted outgoing ports on that Cisco box WITHOUT commiting something that is considered illegal ? I meant can I run some program to poke/gather info in that box to gather their ACL for outgoing service only ? I am NOT interested in what can go in but what can come out. The friend is NOT a computer person and has NOT much knowledge of TCP/IP etc so I can't get him to talk to the IT guy easily about those things. I know port 80 is permitted but I don't really want to run a telnetd at that port. Any suggestion ?