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iptables firewall with multiple external interfaces routing probl em
From: Jeff Adam <jadam () seark edu>
Date: Wed, 9 Jul 2003 13:59:54 -0500
The problem that I have run into is that only the first dhcp interface to activate will talk to the internet. I place my DMZ behind eth2 and my LAN behind eth1 and eth0 then forward port 25 on eth2 to my exchange server on my DMZ and 80 to my web server on my DMZ redhat 9 iptables fw eth0 external connected to cable dhcp reserve x.x.x.12 eth1 external connected to cable dhcp reserve x.x.x.45 eth2 external connected to cable dhcp reserve x.x.x.55 eth3 internal connected to LAN 172.x.x.x eth4 internal connected to DMZ 192.x.x.x eth5 inactive not used The problem is that when the system boots only the LAN has internet connectivity behind eth0. I can deactivate eth0, eth1 and eth2, then activate only eth2, and only the DMZ has connectivity. The internet is able to connect back to the servers in my DMZ as planned. I then activate eth0 and eth1, and still only the DMZ has connectivity. I deactivate eth0-2 and only the interface that activates first appears to work. I am at a loss as to what I am missing. _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
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- iptables firewall with multiple external interfaces routing probl em Jeff Adam (Jul 11)