u1. Front-end application being used had hundreds of
users worldwide, but all
calls to the web service were made by a single source application server.
u2. Specific permission granted to source application
server to bypass proxy server and
directly call web service.
u3. Both source and target servers only existed within
the .mil domains and were
invisible to normal Internet traffic.
u4. Specified path routed through several firewall
devices was set up
between the source and target servers.