How to redirect traffic to one IP to a different IP on Windows Server 2008

Use Netsh commands for Interface Portproxy: http://technet.microsoft.com/library/cc776297%28v=ws.10%29.aspx

You can do that only on a router, and you'd need quite a powerful one, too.

You just can't tell to a server "treat this IP address as if it was another one".

If your application was looking for a certain hostname, you could map that to a given IP using the HOSTS file; but redirecting one IP to another is... well... a lot more tricky.

You can add a secondary IP address to the new server. Go to control panel, network connections. Right click on the network interface and select properties. Select Internet protocol and click on properties. Click on the advanced button. Under the IP address box click add and enter the ip address for the old server.

Another option if you are using seperate networks (looks like might be based on the difference if ip address ranges) you can use a NAT router and put the old address on the WAN port and redirect the traffic to the new IP address on the LAN port.

You don't give a lot of detail but I'm assuming you mean that you have a server\service at 66.221.24.31 that used to be at 83.83.83.83, right? If so, are both ip addresses allocated to your organization and do they both get routed to your network? If yes, then I think you could probably use NAT at your router/firewall to translate anything coming in for the old address to the new address.

Also, if the server\service is for web hosting, email, ftp, etc., etc. why not just change the DNS records for those resources to point to the new address?

Can you elaborate on your question?