HTTP HTTP GET HTTP proxy HTTP proxy Basic auth HTTP proxy NTLM auth # Server-side HTTP/1.1 407 We only deal with NTLM my friend Server: Microsoft-IIS/5.0 Content-Type: text/html; charset=iso-8859-1 Content-Length: 34 Proxy-Authenticate: NTLM This is not the real page either! # Client-side proxy http HTTP with proxy requiring NTLM, but we send Basic http://%HOSTIP:%HTTPPORT/%TESTNUMBER --proxy-user testuser:testpass -x http://%HOSTIP:%HTTPPORT # Verify data after the test has been "shot" GET http://%HOSTIP:%HTTPPORT/%TESTNUMBER HTTP/1.1 Host: %HOSTIP:%HTTPPORT Proxy-Authorization: Basic dGVzdHVzZXI6dGVzdHBhc3M= User-Agent: curl/%VERSION Accept: */* Proxy-Connection: Keep-Alive