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#! rnews 3104 bsd Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!spool.mu.edu!uwm.edu!cs.utexas.edu!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!feed1.news.erols.com!news From: Ken Bigelow <kbigelow@www.play-hookey.com> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Two devices with same IP Date: Thu, 21 Nov 1996 18:44:52 +0000 Organization: Erol's Internet Services Lines: 56 Message-ID: <3294A324.902@www.play-hookey.com> References: <56ltqk$nhv@csugrad.cs.vt.edu> <56lvvc$62f$1@gail.ripco.com> <32920988.63E7@www.play-hookey.com> <571pde$mp8@sf18.dseg.ti.com> Reply-To: kbigelow@www.play-hookey.com NNTP-Posting-Host: kenjb05.play-hookey.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (Win16; U) To: rnestor@metronet.com, rnestor@ti.com Bob Nestor wrote: > > In article <32920988.63E7@www.play-hookey.com>, kbigelow@www.play-hookey.com > says... > > > >Brian Somers wrote: > >> > >> In article <328EF58B.16E4@www.play-hookey.com>, > >> Ken Bigelow <kbigelow@www.play-hookey.com> writes: > >> : I have no problem with that. My gateway/mailserver/Webserver/etc. is > >> : running FreeBSD 2.1R. It uses a 33.6k modem for connection to my ISP, > >> : and an NE2100 clone (lnc0) for my local network. Both ports have the > >> : same IP address, and work fine with no trouble. Since they are both > >> : attached to the same box, neither my ISP nor my local network (nor > >> : anyone else) have any trouble indentifying this box as a unique node. > > >> > >> Of course this assumes that all but one of the interfaces have a netmask > >> of 0xffffffff :) > >> > > > >Sorry, brian, but no. From my /etc/sysconfig file: > > > > > >network_interfaces="cuaa1 lnc0 lo0" > >ifconfig_cuaa1="inet 206.161.179.129 netmask 255.255.255.224" > >ifconfig_lnc0="inet 206.161.179.129 netmask 255.255.255.224 mtu 1006" > >ifconfig_lo0="inet localhost" > > > > >Seems to still be working fine. > > One should never assume that software (or a system configuration) is bug-free > due to the absence of observable errors. It might prove interesting to do > some low-level traces and see what's really happening. ifconfig -a shows both interfaces present, with ppp0 happily connected to my ISP's port. netstat -i shows both interfaces happily coexisting, with different numbers of Ipkts and Opkts, as appropriate. My daughter can readily telnet to the server and use it from inside, while I can telnet to it at the same time from outside. Or vice versa, or whatever configuration, just as you would expect to see from a multi-user, multi-tasking system. Or we can just use it as a gateway either way, and that works fine, too. We have been doing this for several months now. What error would you expect to pop up now to cause a problem, and why hasn't it done so already??? From observed behavior, if the system isn't bug-free, it's doing a darn good imitation so far! -- Ken Are you interested in | byte-sized education | http://www.play-hookey.com over the Internet? |