Many domains from another server pointing to one domain

multiple domains pointing different server

[guitarfish]

I have a website on a server on the east coast and have a server on the west coast that has 75 domains related to the 1st domain. Each of these 75 domains share the same ip address. What is the best way to link all these sites to the 1 site on the east coast so I can track if I get sales from these sites. By the way all the 75 domains have unique content.
Thanks.

[jtara]

This probably belongs in the "tracking and logging" forum.

And define "link". I'm really not understanding the question.

Do the 75 sites send traffic to the 1 site to complete a sale? Does the user end-up on the 1 site when they place an order?

If so, one approach is to treat the 75 sites as if they are affiliates. Search for software for affiliate tracking. You'll add a query string to the links, add some tracking code to your checkout page, and the software will keep track of clicks and sales.

Alternately, you can use the referrer field, so that you don't need to add query strings. But be aware that some users might block referrer information in their browser. (Probably most users don't even know how to do this, though.)

You may find that your log analysis package or an alternate log analysis package already has what you need to do this, though tying it into sales would be more difficult.