ip alias and firewall
the following is our network:
[site A] pc A -> firewall A-> internet (VPN) -> [site B] firewall B -> linux1, linux2 linux1: 1.1.1.1 (ip alias 1.1.1.3) linux2: 1.1.1.2 1.1.1.3 will be switched between linux1 and linux2. pc A accesses linux1, linux2 via VPN. when 1.1.1.3 is switched to linux2. pc A could access it. within site B, 1.1.1.3 could be accessed by linux2 and other PC. I checked the arp table in firewall B. the MAC of 1.1.1.3 is either missing or wrong (pointed to linux1). that is the reason why pc A could not access 1.1.1.3 the ipalias is added by gnome->system->admin->network Pls advise how to let firewall B to know the correct MAC addr when the ip alias is changed to another PC. |
The MAC of an alias is the same as the MAC of the primary since it is going to the same card as the primary.
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