What I am trying to accomplish is I want a specific machine on my lan to be seen publicly from a specific IP address. I have a block of 5 addresses from my ISP. In my network interface I have the first IP address configure as the first address in the block and four virtual IP's for the rest. I want this specific computer to be seen as one of these virtual IP addresses. Looks like I need to be using SNAT for this, but I can't seem to figure it out. I did find this on serverfault:
http://serverfault.com/questions/608228/how-to-configure-source-nat-private-ip-public-ip-outbound
Once I set this up I get no access to the internet at all from the local pc. Can anyone clear this up who has done this. The documentation seems sparse for SNAT.