I am considering buying one of the Vigors but wish to confirm multinat dpes what I think it does. SO with multi nat I could have two DNS entries set up. Eg:

server1.mydomain.org--> a.b.c.d (one of my allocated external IP's)
bserver2.mydomain.org--> w.x.y.z (another of my allocated external IP's

And I can set up multi nat so requests for server1.mydomain.org goto one PC on my network and requests for server2.mydomain.org goto a different pc (and the two servers may be accepting the same, different or overlapping range of ports)

So can someone conform this is all possible, please.

Many thanks in advance

That is how it works - you'd add the addtiional addresses using the WAN IP Alias button on the WAN1 setup page then you can use those additional addresses for port forwarding / DMZ.

Great - many thanks for your prompt reply