TCPIP listen for web connections on more than one ip address

I apologise for the length of this query, but I am so confused I’m going around in circles!

A) What I’ve got.

I have a single R6 domino server partition running on a single win2k primary domain controller with a single network card.

The machine name is SVR1, and the windows domain name is (for the sake of this example) domainB.co.uk, so the DNS service on the server shows the host name to be SVR1.domainB.co.uk.

B) What I want.

I want to host several web sites on the SVR1 machine, with completely different domain names: e.g. www.domainA.net, www.domainB.co.uk, www.domainC.co.uk.

Question 1.

Is this possible?

C) I also have:

I have a batch of 8 public ip addresses from my ISP, 5 of which I am apparently allowed to use, the rest are reserved for ‘broadcast’ or something…

I have set up network address translation within the router for 3 of these public ip addresses so that they map to 3 internal ip addresses for port 80. As far as I can make out, this means that any http traffic coming in on 62.49.168.XXX:80 maps to one of my internal ip addresses, 62.49.168.XXY:80 maps to another, and the third 62.49.168.XXZ:80 to the last one.

I am not fussed about logins and authentication for accessing the different web sites on the domains, but it would be nice to be able to send SMTP mail as if it comes from each domain separately. (This may well be a separate question altogether for later, but I’m just putting you in the picture!)

Finally, I have set the server document in the NAB to say load internet configurations from internet site documents, and set up three web site documents pointing to three different notes databases. The web site documents define everything I can think of in the ‘host names or addresses mapped to this site’ field: e.g. the external ip address 62.49.168.XXX, the internal ip address 192.168.254.AAA, and also www.domainA.net and domainA.net.

Question2.

Having registered the domains on the internet, and set up the DNS zone files at the agent’s site to point the www.domainA.net, www.domainB.co.uk etc. at the three correct public ip addresses, what else do I need to do?

2a) Do I need to create 3 separate TCPIP ports on the server

2b) Do I need to add TCPIP_TCPIPAddress=[something] in the Notes.ini

2c) Do I need to add the three domain names to the server document in the Internet Protocols HTTP Basics ‘Host name(s)’ field and set ‘Bind to host name’=Enabled

2d) Do I need to modify the hosts file on the SVR1 machine?

I really hope there’s something fundamental and simple I’ve forgotten to do, as I’m not sure how much more by poor brain can take!