PROBLEM:

I have to connect a Lan (192.168.10.11/13) with a ADSL router (192.168.254.254). To do this I have to use a linux machine with two network cards. Eth0 will be connected to Router (so I gave it 192.168.254.10) while Eth1 to the lan (so I putted it 192.168.10.10).

I'm working on Slack 8 and I'm totally new to linux (but very willing to learning!!!).

I tried to put on proxyarp (whithout knowing what it is..) and the ipforward to 1. The only result is that everything in the network can ping the other things.

Can someone tell me how to configure that well? (I just need to share the net without firewalling for the moment..)

THANKS in advance!!

Cripes, I forget what proxy-arp is about too. I don't think you need it for what you're trying to do - I have setup a couple of systems like that. Probably you just need to add some forwarding rules in iptables. The best info I've found is here:

http://tldp.org/HOWTO/IP-Masquerade-HOWTO/index.html

Your external interface is eth0, internal is eth1 - a lot of ip masq writeups assume you have a modem but yours is ethernet.

Couple of others, not quite so up-to-date and i haven't read them:

http://tldp.org/HOWTO/Home-Network-mini-HOWTO.html
http://tldp.org/HOWTO/Masquerading-S...WTO/index.html

I let everything pass with the forwarding (input output and forward are accept) and I just add the default gateway (the router ip address). this way the linuxpc can ping everything and can access internet, while a client can ping everything inside the network (even the router ip) but not on internet.

Another thing (maybe it's not relevant.. a NAPT is on on the router and if I disable it I cannot connect on internet.. It cannot be set other than just on or off).