Whoops. I sometimes confuse ipchains and iptables, forgetting which is the current one. Defer to rob's suggestion unless you have a much older variant.
On Jan 16, 2008 1:30 PM, Rob Sherwood <[EMAIL PROTECTED]> wrote: > On Wed, Jan 16, 2008 at 12:58:08PM -0500, Justin Walker wrote: > > Hey everyone: > > > > I've got a 2-part problem I was hoping someone could help me with. > > > > I've got an old p2 machine running RHEL that's acting as a gateway > > server/router (2 NIC's, daisy-chained to a big switch). Everything > works > > fine with all the computers inside the network when they are using LAN > IP's > > (192.168.0.XXX). However, I want to assign one of the computers inside > the > > network a university WAN IP (129.2.64.XXX). I figured that I should be > > able to just assign the IP to the machine and the gateway server would > just > > silently pass traffic though - but no dice. If it's not on a LAN IP, it > > can't see the network. Does anyone know if there is a way to set this > up? > > A routing rule perhaps? > > You have to enable ip forwarding: > > echo 1 > /proc/sys/net/ipv4/ip_forward > > Past that, as long as the computer knows about both networks, it will > route packets between the two machines (check `route` to make sure both > networks appear). > > > Secondly, I want to forward WAN SSH traffic to a particular computer on > the > > LAN. Does anyone know how to set up a port forwarding rule so I can > > redirect all port 22 traffic to a particular LAN IP? I know how to do > it > > on my home router, but I can't seem to figure it out for this old linux > > box. > > check out iptables with destination natting: > > http://linux-ip.net/html/nat-dnat.html > > good luck, > > - Rob > . > -- Mehmet Yilmaz
