Date: Tue, 2 Nov 1999 02:21:47 +0100 (CET) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-questions@FreeBSD.ORG Subject: How to route a single box into a subnet Message-ID: <199911020121.CAA26450@dorifer.heim3.tu-clausthal.de>
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Hello, We have a /24 subnet (let's call it 1.2.3.0), and for some technical reason there is one machine (1.2.3.55) that has to be routed through another machine (1.2.3.44). The router (.44) runs FreeBSD -stable and has two network interfaces -- one is connected to the rest of the network, and the other is connected directly to the .55 machine (via a crossed TP cable). The .55 machine has only one network interface, and it's running various operating systems (W95, Linux, FreeBSD). What is the easiest way to do such a setup? Of course, the .55 box should have full internet access. All IPs are static, no dial-up. It is not possible to change the configuration of other boxes or gateways on the network, i.e. the routing has to be "hidden" -- I guess that means that an arp proxy is required. At first, I tried to setup the two interfaces of the router machine like this: 1.2.3.44 netmask 255.255.255.0 (the "outer" one) 1.2.3.45 netmask 255.255.255.255 (the "inner" one) and then enable IP forwarding, and run choparp (from ports/ net) as a proxy arp server. However, it just didn't work. A simple "ping" resulted in error messages from the arp resolver ("could not allocate llinfo" or similar -- I can reproduce it and copy the exact error message if someone wants to see it). I guess it's because the kernel doesn't like that the .55 box was not within the network of the .45 interface of the router (even though the router had a static route for that box, of course). So, what should I try next? Using "private" address spaces (e.g. 10.x.x.x) between the two boxes, and ipnat on the router to translate it to the normal .55 address? I still need an arp proxy in that case, don't I? (I've never done anything with ipnat or NAT in general before, so I'm a bit unsure.) Thanks in advance for any hints and suggestions! Regards Oliver -- Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany (Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de) "In jedem Stück Kohle wartet ein Diamant auf seine Geburt" (Terry Pratchett) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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