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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!nntp.coast.net!zombie.ncsc.mil!news.mathworks.com!newsfeed.internetmci.com!howland.reston.ans.net!agate!sunsite.doc.ic.ac.uk!demon!pencotts.demon.co.uk From: Andrew Gordon <andrew.gordon@net-tel.co.uk> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Need help configuring /dev/bpf0 Date: Fri, 29 Dec 1995 01:48:55 GMT Lines: 16 Message-ID: <820201735.23333@pencotts.demon.co.uk> References: <4but1q$l3m@news.abq.bdm.com> NNTP-Posting-Host: pencotts.demon.co.uk X-NNTP-Posting-Host: pencotts.demon.co.uk X-Mailer: Mozilla 1.1N (X11; I; BSD/386 uname failed) MIME-Version: 1.0 To: rhughes2@bdm.com X-URL: news:4but1q$l3m@news.abq.bdm.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii rhughes2@bdm.com (Ralph Hughes) wrote: >I am attempting to use tcpdump to build some network stats tools. However >whenever I invoke tcpdump I get a "device not configured" error on /dev/bpf0. >Do I need to rebuild the kernel to use packet filtering ? Yes. >If so, what parameter needs to be changed and where ? Add the following to your kernel configuration: pseudo-device bpfilter 4 (where the '4' can be any number, giving the maximum number of copies of tcpdump or other applications using bpf that you wish to use simultaneously).