Date: 16 Dec 1998 13:06:12 +0200 From: Antti Kaipila <anttik@iki.fi> To: hackers@FreeBSD.ORG Cc: Jamie Bowden <jamie@itribe.net> Subject: Re: Source address Message-ID: <87r9u0tkgr.fsf@pens.ion.sci.fi> In-Reply-To: Jamie Bowden's message of "Tue, 15 Dec 1998 08:32:06 -0500 (EST)" References: <Pine.SGI.3.96.981215082749.18639i-100000@animaniacs.itribe.net>
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So. If there is no current solution to this problem, I'm thinking of doing the neccesary modifications to the kernel. I'm not a kernel hacker but this problem does'nt seem too hard to solve. So I'd like to get your oppinnions. I'm thinking of using the sysctl interface to the kernel. Introduce a new variable and if this variable is set outgoing packets are given source address described in this variable. This would be done just before the source address is set to the outgoing interface if it's not already set. (in ip_output.c) I really have no real clue if this is the right way to go it's just my first idea and I'd like to hear whay you think about it. Thanks. Jamie Bowden <jamie@itribe.net> writes: > On Tue, 15 Dec 1998, Richard Smith wrote: > > > Antti Kaipila wrote: > > > > > > I have a interesting problem here. I have FreeBSD accting as a router > > > between our LAN and Internet. I have a ET5025 card as interface eth0 and > > > Intel EtherExpress as interface fxp0. > > > > > > eth0 has address 10.156.214.2 and remote ends address is 10.156.214.1. > > > fxp0 has address 195.74.8.138 > > > > > > So, now when I try to connect from this machine acting as router to > > > anywhere on the internet my source address get set to > > > 10.156.214.2. Which is not nice, because all routers are dropping my > > > packets thinking they should'nt be routed (that's the right thing to > > > do ofcourse). > > > > > > Is there any way around this? > > > > You need to run natd on your FBSD router, so that all packets 'appear' > > to > > originate from *it* (195.74.8.138). See man natd. > > Not quite. His ISP is using 1918 networks between routers. > > I do this as well. With Cisco you can set the primary IP of the router, > and all traffic appears to come from that IP, no matter which interface it > goes through. If there is a way to have FreeBSD always report the > connection as coming from it's usable IP, all that has to be done is to do > it, but I don't know if FreeBSD can do that. > > Jamie Bowden > > -- > Systems Administrator, iTRiBE.net > > If we've got to fight over grep, sign me up. But boggle can go. > -Ted Faber (on Hasbro's request for removal of /usr/games/boggle) > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > -- Antti Kaipila <anttik@iki.fi> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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