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Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!howland.reston.ans.net!xlink.net!subnet.sub.net!smurf.noris.de!smurf.noris.de!not-for-mail From: urlichs@smurf.noris.de (Matthias Urlichs) Newsgroups: comp.os.386bsd.misc Subject: Re: NetBSD on cheap boxes Date: 14 Jan 1994 13:40:40 +0100 Organization: Smurf-O-Box, Nuernberg, FRG Lines: 20 Message-ID: <2h63s8$4s2@smurf.noris.de> References: <2h2u3kINN6o3@ymir.cs.umass.edu> NNTP-Posting-Host: localhost Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit In comp.os.386bsd.misc, article <2h2u3kINN6o3@ymir.cs.umass.edu>, doyle@cs.umass.edu writes: > Hehe.. I bought a cheap 386sx box to run NetBSD solely as a router. Speaking of which... are there kernel patches to selectively block packets? For example, don't forward TELNET to this site, block IRC for that network, only allow SMTP to the other machine. I assume a rather quick hack to ip_forward should work; fragmented IP packets might be a problem except that the first TCP or UDP packet on any given connection almost never is fragmented. -- Brown's Law of Business Success: Our customer's paperwork is profit. Our own paperwork is loss. -- Matthias Urlichs \ XLink-POP Nürnberg | EMail: urlichs@smurf.noris.de Schleiermacherstraße 12 \ Unix+Linux+Mac | Phone: ...please use email. 90491 Nürnberg (Germany) \ Consulting+Networking+Programming+etc'ing 42 Click <A HREF="http://smurf.noris.de/~urlichs/finger">here</A>.