So, externally I'm using DNS SRV records to get traffic to my proxy server.  Once it hits my proxy server though, I want to preserve the domain name portion of the URI, but still route the traffic around from server to server.  

Currently I'm using rewritehostport to forward traffic onto another box.  This of course changes the field I'm interested in preserving. Is there another way to route traffic around?  

The only other option I see is to use 1 set of SRV records externally and another set of SRV records internally.

Thanks.

-Daniel