foobar@ubuntu-vm:~$ curl www.google.com -IL HTTP/1.1 302 authenticationrequired Date: Tue, 26 Jan 2016 06:46:15 GMT Location: http://10.155.120.23:9090/mwg-internal/de5fs23hu73ds/plugin?target=Auth&reason=Auth&ClientID=2297288988&ttl=600&url=aHR0cDovL3d3dy5nb29nbGUuY29tLw==&rnd=1453790775 Connection: Keep-Alive Content-Type: text/html Cache-Control: no-cache
HTTP/1.1 401 authenticationrequired Date: Tue, 26 Jan 2016 06:46:15 GMT Connection: Keep-Alive Content-Type: text/html Cache-Control: no-cache WWW-Authenticate: NTLM WWW-Authenticate: Basic realm="MY COMPANY WEB GATEWAY"
You can see from above that my proxy ip address is 10.155.120.23, and my proxy port is 9090.