Redirecting web traffic transparently

[shakeshuck]

To use clickbank as an example:

Affiliates (advertisers) and sellers both sign up for the service. I provide the affiliate with a link which will send a potential customer (via me) to the seller's web site. The affiliate's details are recorded and if a transaction takes place, the seller pays me a commission, and I pay the affiliate.

The forwarding must be transparent to the customer, and the IP address must stay intact so that any anti-fraud measures taken by the on-line shop doing the business remain valid. I don't want dodgy credit card transactions coming back to me instead of the perpetrator.

So yes, the server will be an internet-available domain, and the customers worldwide.