Our server has 3 nics, one connected to the net and two to the internal network (one on 192.168.0.x and another on 192.168.1.x). When I upgraded to the 2.4.x kernel the firewalling rules were changed from ipchains to iptables. I have one iptables command line: iptables -t nat -A POSTROUTING -o eth0 -j MASQ Both internal networks can connect to the net. The problem is the networks can't connect to one another. Anybody has experience with iptables? When I was using ipchains, the two internal networks can "see" each other. My ipchains command before was: ipchains -P forward DENY ipchains -A forward -i eth0 -s 192.168.0.0/24 -j MASQ ipchains -A forward -i eth0 -s 192.168.1.0/24 -j MASQ -- Mike _ Philippine Linux Users Group. Web site and archives at http://plug.linux.org.ph To leave: send "unsubscribe" in the body to [EMAIL PROTECTED] To subscribe to the Linux Newbies' List: send "subscribe" in the body to [EMAIL PROTECTED]