transfer specifed IP to other Web Address

You can get the actual ip of the client using this code below (it will get the real client ip, even if the client is using a proxy)

string ip = Request.ServerVariables("HTTP_X_FORWARDED_FOR");
if (!string.IsNullOrEmpty(ip))
{
   string[] ipRange = ip.Split(',');
   ip = ipRange[0];
}
else
{
   ip=Request.ServerVariables("REMOTE_ADDR");
}

The can be done rather simple using a Response.Redirect.

Good luck!