Trying to set up EzProxy server on the library server to go through BM
proxy server so out going request go out using the IP of the BM server
instead of the public (NATed) IP of the library server. There is a
configuration file and a parameter called proxy where it format is:

PROXY IP:Port Username:Password

I tried

PROXY .username.context:password

along with all other possibilities for usename:password but nothing
works. The "Test Network Connectivity" always says "Proxy server
denied access"

The author of the software said:

The page that you sent from BorderManager was not the type of challenge

that I expected for the type of authentication that EZproxy provides.
you know if BorderManager can be configured to use
basic"? That is what EZproxy is trying to use.

Any ideas?