From owner-freebsd-questions Sun Sep 12 4:39:11 1999 Delivered-To: freebsd-questions@freebsd.org Received: from flood.ping.uio.no (flood.ping.uio.no [129.240.78.31]) by hub.freebsd.org (Postfix) with ESMTP id 1EE8014F6E; Sun, 12 Sep 1999 04:39:04 -0700 (PDT) (envelope-from des@flood.ping.uio.no) Received: (from des@localhost) by flood.ping.uio.no (8.9.3/8.9.3) id NAA13690; Sun, 12 Sep 1999 13:39:02 +0200 (CEST) (envelope-from des) To: Ben Smithurst Cc: "Jeremy L. Ramirez" , dev-null@ns1.digicomsystems.net, freebsd-questions@FreeBSD.ORG, freebsd-security@FreeBSD.ORG Subject: Re: How to prevent motd including os info References: <4.2.0.58.19990911151659.00aa8d60@ns1.digicomsystems.net> <19990912012524.B41509@lithium.scientia.demon.co.uk> From: Dag-Erling Smorgrav Date: 12 Sep 1999 13:39:01 +0200 In-Reply-To: Ben Smithurst's message of "Sun, 12 Sep 1999 01:25:24 +0100" Message-ID: Lines: 12 X-Mailer: Gnus v5.5/Emacs 19.34 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Ben Smithurst writes: > An even better way is to disable telnet completely, and use ssh like you > should. Note that people can still use nmap or something to guess at > your OS. # ipfw add 1 deny tcp from any to any in tcpflags syn,fin No they can't. DES -- Dag-Erling Smorgrav - des@flood.ping.uio.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message