Is there an easy way to hit different IP addresses of a site that are usually load balanced?

I have a set of SharePoint servers in a farm that I would like to test. The web front end servers are typically accessed from behind a hardware load balancer, but they can be accessed directly by manipulating the host file on our Windows workstations. I'd like to know what tools are available that don't require altering the host file to do this type of testing. SharePoint servers need the host name to be passed in the HTTP request so that the servers know what site to serve since the servers host sites with multiple host names. I need to be able to test each of my servers in the load balancing pool individually to confirm proper operation.