Hi I always configured linux gateways with DSL-pppoe, but now I have to do it with dhcp and I can't get it working. I checked both interfaces at the gateway machine and the packets from the LAN reach it, but the responses don't get back past it. I had the same problem with pppoe, but it was related to MTU size, and I tried the same now but it doesn't work, so it seems a problem within the eth connected to the router and the machines inside the LAN. I searched for information on this but there's nothing beside the trivial tutorials on DSL setup. Since I'm testing with a pretty simple rules set, I'd like to ask if there's anything wrong, or if the problem may be at the routing tables. This is what I'm using... eth1 is connected to DSL, eth0 to the router. iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -P FORWARD ACCEPT iptables -A INPUT -j ACCEPT -i lo iptables -A INPUT -j ACCEPT -s 192.168.1.0/24 iptables -A INPUT -j ACCEPT -i eth1 -m state --state ESTABLISHED,RELATED iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j MASQUERADE iptables -A FORWARD -j ACCEPT -i eth1 iptables -A FORWARD -j ACCEPT -s 192.168.1.0/24 iptables -A FORWARD -j DROP iptables -A INPUT -j ACCEPT -p tcp --dport 21 iptables -A INPUT -j ACCEPT -p tcp --dport 22 iptables -A INPUT -j ACCEPT -p tcp --dport 80 Thanks for any help... -- Pedro Werneck
