On Fri, Dec 29, 2006 at 04:42:49PM -0500, Matt Price wrote: > From: Matt Price <matt.price@utoronto.ca> > To: TLUG <tlug@ss.org> > Subject: bridge eth1 to eth0? > Date: Fri, 29 Dec 2006 15:51:31 -0500 > > > hi, > > for stupid reasons I need to install via netboot on a compaq tablet > (hoping this will work, it's my last shot!). I have an ubuntu desktop > with two ethernet cards, eth0 & eth1, and have set up dhcp & tftp on > eth1 as documented in various places on the web, e.g. here: > > http://www.debian-administration.org/articles/478 > > > this works fine to a point. I have the ubuntu edgy netboot images > in /var/lib/tftpboot, my tablet starts up with pxe, finding the images, > and is ready to install but cannot find the broader internet 0-- it > doesn't seem to see past the eth1 subnet. So, probably a simple > question: how do I enable the eth1 traffic to bridge across to eth0 > and thus access the whole internet? I guess it has something to do with > ip forwarding or ip masquarading or one of those very scary and arcane > pieces of dark magic. yes its ip_forward. not scary or arcane. since you're behind a firewall, you may not have to do anything more than turn it on. not sure if it'll pass through back to you -- that may require ip masquerade. simple easy test: as root echo 1 > /proc/sys/net/ipv4/ip_forward and see what happens. that should immediately turn on ip forwarding. because you're already behind a router (firewall too?) you don't need any other bits so that may be enough. you should google on this subject a bit. A
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