Whoops should read: However, # iptables -t nat -A POSTROUTING -o eth1 -j SNAT -to $EXTIP works! -----Original Message----- From: Storm D. J. Petersen [mailto:stormp@telus.net] Sent: Thursday, February 20, 2003 7:48 PM To: netfilter@lists.netfilter.org Subject: linux-2.4.20 iptables-1.2.7a DHCP on EXTIF Importance: High Hi, I am still confused. ;-) I upgraded my kernel to 2.4.20 and now # iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE doesn't work. However, # iptables -t nat -A POSTROUTING -j SNAT -to $EXTIP works! My problem is that I am behind a cable modem that changes my IP address daily. So, what does one do if their eternal interface uses DHCP? Thanks. S.