Date: Sun, 12 Sep 1999 09:34:08 -0600 From: Nate Williams <nate@mt.sri.com> To: Dag-Erling Smorgrav <des@flood.ping.uio.no> Cc: Ben Smithurst <ben@scientia.demon.co.uk>, "Jeremy L. Ramirez" <jramirez@digicomsystems.net>, dev-null@ns1.digicomsystems.net, freebsd-questions@FreeBSD.ORG, freebsd-security@FreeBSD.ORG Subject: Re: How to prevent motd including os info Message-ID: <199909121534.JAA18584@mt.sri.com> In-Reply-To: <xzpn1usmka2.fsf@flood.ping.uio.no> References: <4.2.0.58.19990911151659.00aa8d60@ns1.digicomsystems.net> <19990912012524.B41509@lithium.scientia.demon.co.uk> <xzpn1usmka2.fsf@flood.ping.uio.no>
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> > 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. Except if you do this the box is unable to provide *ANY* external sevices, including email and/or DNS service. :( Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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