Date: Sat, 17 May 2003 21:42:14 -0400 From: Chuck Swiger <cswiger@mac.com> To: Robert Puyol <puyol@noos.fr>, freebsd-questions@freebsd.org Subject: Re: dual homed host Message-ID: <3EC6E4F6.60201@mac.com> In-Reply-To: <27871523-88AD-11D7-A24E-000393562F10@noos.fr> References: <27871523-88AD-11D7-A24E-000393562F10@noos.fr>
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Robert Puyol wrote: [ ... ] > My setup is: one FreBSD server, one interface, two ISP, each providing a > router. So I would like to set up a dual homed host, to be able use the > two ISP. "Dual-homed" refers to a machine with two physical network interfaces. > 0) do I need to do a sysctl net.inet.ip.forwarding=1 to get a working > dual homed host ? You'd enable ipforwarding if you wanted the machine to route traffic between two or more physical network interfaces...but that's not what you have. > 1) I set an alias (private IP to use the ISP2): "ifconfig rl0 inet > 10.0.1.4 netmask 255.255.255.0 alias", the I can ping 10.0.1.4 but not > the router at 10.0.1.1. What's wrong ? If your alias is on the same subnet, you need to use a netmask of 255.255.255.255, I believe. > 2) I set route: "route add -net 10.0.1/24 10.0.1.1 0", but yet I am > still not able to ping the router at 10.0.1.1 or to ping my public IP > from another network. Yeah: I don't think what you were trying is going to work. > If I set the defaultrouter=10.0.1.1 (ISP2 router on my network) in > rc.conf I can use the ISP2 public IP to acces my server, but then I > loose the access to the primary IP of the ISP1... You can only have one static default route. Fancier routing protocols-- specificly, dynamicly link state protocols like OSPF-- are what's neeeded for what you're trying to do. -Chuck
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