I have put an entry into my hosts file to resolve a DNS name to a local
server on my network. www.someotherdomain.com

When I try to get to that site from a client with proxy settings pointing
to my BM server, I get the following error message:

Status : 502 Bad Gateway
Description : DNS Host address list could not be resolved

On my BM server, I can check the DNS cache and see that it has loaded the
entry from the hosts file and is pointing to the right address (on my
internal network.)