I have solved my own problem! I am posting it because I've received a few private messages with people suffering from the same symptoms. I have Redhat7.3 base install and the default location of iptables is /sbin/iptables* and /lib/iptables/* The default for iptables Makefile is to install to /usr/local/sbin/iptables* and /usr/local/lib/iptables/* Originally I had compensated for the executable path but not for the library path. As a result, I am assuming that iptables was using my old iptables*.so's. QUICK FIX: # cp /usr/local/sbin/iptables* /sbin # cp /usr/local/lib/iptables/* /lib/iptables # iptables -version iptables v1.2.7a # iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE WORKS Hope that helps anyone with the same problem. -----Original Message----- Message: 3 Reply-To: <stormp@telus.net> From: "Storm D. J. Petersen" <stormp@telus.net> To: <netfilter@lists.netfilter.org> Subject: linux-2.4.20 iptables-1.2.7a DHCP on EXTIF Date: Thu, 20 Feb 2003 19:48:09 -0800 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. --__--__-- Message: 4 Reply-To: <stormp@telus.net> From: "Storm D. J. Petersen" <stormp@telus.net> To: <netfilter@lists.netfilter.org> Subject: linux-2.4.20 iptables-1.2.7a DHCP on EXTIF Date: Thu, 20 Feb 2003 20:05:03 -0800 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.
