Not that this is going to help you, but I have a similar setup where I DO have control over the Cisco, and it works just fine. I think that they my be running some sort of anti-arp spoofing on the Cisco that assumes the different IP's on the same MAC (during the same arp refresh interval) is a bad thing and drops them...again - no real help, but maybe they (the Cisco owners will budge for you?)
Just curious - did you try different IP's for the actual interface (eth0) - maybe they are only allowing one IP through? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of ssiusa Sent: Wednesday, March 06, 2002 5:23 PM To: [EMAIL PROTECTED] Subject: multiple ip & mac address problem Dear All, We have an unusual problem. We have just installed a rh7.1 firewall with iptables 1.2.5, we have multiple virtual ip's on one nic (all have the same mac) connected to a lan which is then piped to the internet through another section of our network to the internet.. The firewall works just fine if you are on the lan that the nic is on (X.X.56.X), but if you attempt to connect to this network (x.x.56.x) from outside the connection fails, when just one ip is set it works just find from everywhere. we have traced the problem to a cisco 7500 router (which we have no control over) and the mac address of the nic, if we could have multiple ip's and multiple mac address for the ip's I am sure it would work. I tried to change the mac of the card (eth0) which worked, then I tried to change the mac of the virtual ip's (eth0:1, eth0:2, etc) which just changed the mac of eth0. Does anyone have any suggestions for a solution??? Has anyone had the same problem?? Thanks Shaun
