Clavister: How to add an additional IP address to an interface?
What if you need an additional IP address on one of the security gateway’s interfaces?
After searching the cfw-users mailing list’s archive I found a solution:
Under Interfaces -> ARP I had to add an entry have the security gateway publish its arp address for the IP address on the desired interface:
Mode: Publish
Interface: Interface with the IP Address
IP Address: The IP Address to be published
MAC Address: 00:00:00:00:00:00
Source:
http://archive.netbsd.se/?ml=cfw-users&a=2006-12&m=2703752