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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.uwa.edu.au!classic.iinet.com.au!swing.iinet.net.au!news.uoregon.edu!usenet.eel.ufl.edu!news.interlog.com!news.dra.com!news.mid.net!news.ksu.ksu.edu!hptemp1.cc.umr.edu!serges From: serges@rocket.cc.umr.edu (serges ) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: IP Forwarding under FreeBSD Date: 1 Nov 1995 06:51:21 GMT Organization: UMR Missouri's Technological University Lines: 53 Message-ID: <4775d9$bo@hptemp1.cc.umr.edu> References: <46ngrd$5hq@bilbo.nask.org.pl> <470e8d$1m8@uriah.heep.sax.de> NNTP-Posting-Host: rocket.cc.umr.edu X-Newsreader: TIN [version 1.2 PL2] J Wunsch (j@uriah.heep.sax.de) wrote: : Jaroslaw Bazydlo <jarekb@ire.pw.edu.pl> wrote: : >I've just reinstall my PPP server to FreeBSD machine and noticed that : >IP Forwarding does not simply work. What I did is: : > : >i) recompiled the kernel with : > options GATEWAY : Obsolete. Use ``sysctl -w net.inet.ip.forwarding=1'' instead. "Obsolete" as of what release? True the sysctl approach is quicker - that is if you like the idea of editing the kernel image as a matter of course (and not as a hack) : >ii) executed routed with -s option : Obsolete and dangerous. The static route for the interface is being : installed automatically when the link is up, and you've got the option : (to pppd) to install a default route, too. (Everything else could be : handled by scripts.) "dangerous" why? The "-s" forces routed to do its job (ie. its the default behaviour unlexx -q is specified). If you are running routed (in the first place) on gateway/routing machine, then routed needs to be able to maintain the sanity of your routes. I use it to delete inactive routes created by pppd. Besides, my ppp interface is dynamic and requires that the routing tables be flushed (or monitored) for sanity's sake. : >Could anyone tell me what is wrong. My serwer does not want to forward IP : >pockets out of it. : Can you tell us a bit more about your actual configuration? Many : people can succesfully forward packets with a FreeBSD box, so it's : most likely something with your setup. True. My biggest problem was getting packets to forward in both directions; after blaming the IP forwarding of my FBSD 2.05 gateway, I realized that my ppp connection (a dialup Cisco server) was spoofing my IP packets, which put an end to my hopes getting IP forwarding to work. :( Doug. : -- : cheers, J"org : joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE : Never trust an operating system you don't have sources for. ;-) -- * To the past or to the future. To an age when thought is free. * * From the age of Big Brother, from the age of the Thought police. * * From a dead man; Greetings. *