libcurl log:
2012-Dec-03 15:59:52.739190: cURL debug log started. == Info: About to connect() to proxy <proxy url> port 3127 (#0)
== Info:   Trying <IP address>...
== Info: connected
== Info: Connected to <proxy url> (<IP address><server url>) port 3127 (#0)
== Info: Establish HTTP proxy tunnel to <server url>
== Info: Proxy auth using NTLM with user 'DOMAIN\password'
2012-Dec-03 16:00:23.299246:
=> Send header, 0000000181 bytes (0x000000b5)
0000: CONNECT <server url> HTTP/1.1
002c: Host: <server url>
004d: Proxy-Authorization: NTLM TlRMTVNTUAABAAAABoIIAAAAAAAAAAAAAAAAAA
008d: AAAAA=
0095: Proxy-Connection: Keep-Alive
00b3: 
2012-Dec-03 16:00:23.434259:
<= Recv header, 0000000044 bytes (0x0000002c)
0000: HTTP/1.0 407 Proxy Authentication Required
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000027 bytes (0x0000001b)
0000: Server: squid/2.7.STABLE5
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000037 bytes (0x00000025)
0000: Date: Mon, 03 Dec 2012 14:04:34 GMT
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000025 bytes (0x00000019)
0000: Content-Type: text/html
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000022 bytes (0x00000016)
0000: Content-Length: 1334
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000042 bytes (0x0000002a)
0000: X-Squid-Error: ERR_CACHE_ACCESS_DENIED 0
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000243 bytes (0x000000f3)
0000: Proxy-Authenticate: NTLM TlRMTVNTUAACAAAABgAGADAAAAAGgokA1r/Q4lD
0040: w6+oAAAAAAAAAAGoAagA2AAAAREVWTEFCAgAMAEQARQBWAEwAQQBCAAEAEgBNAFk
0080: ARABWAE0AMAA5ADAAMwAEABIAZABlAHYAbABhAGIALgBhAGQAAwAmAG0AeQBkAHY
00c0: AbQAwADkAMAAzAC4AZABlAHYAbABhAGIALgBhAGQAAAAAAA==
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000040 bytes (0x00000028)
0000: X-Cache: MISS from <proxy host>
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000052 bytes (0x00000034)
0000: X-Cache-Lookup: NONE from <proxy url>
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000055 bytes (0x00000037)
0000: Via: 1.0 <proxy url> (squid/2.7.STABLE5)
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000024 bytes (0x00000018)
0000: Connection: keep-alive
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000030 bytes (0x0000001e)
0000: Proxy-Connection: keep-alive
2012-Dec-03 16:00:23.435259:
<= Recv header, 0000000002 bytes (0x00000002)
0000: 
== Info: Ignore 1334 bytes of response-body
== Info: Rewind stream after send
== Info: TUNNEL_STATE switched to: 0
== Info: Establish HTTP proxy tunnel to <server url>
== Info: Proxy auth using NTLM with user 'DOMAIN\user'
2012-Dec-03 16:00:24.473363:
=> Send header, 0000000317 bytes (0x0000013d)
0000: CONNECT <server url> HTTP/1.1
002c: Host: <server url>
004d: Proxy-Authorization: NTLM TlRMTVNTUAADAAAAGAAYAEAAAAAYABgAWAAAAA
008d: YABgBwAAAABAAEAHYAAAALAAsAegAAAAAAAAAAAAAABoKJAERTMW/eViUuAAAAAA
00cd: AAAAAAAAAAAAAAAKp+Of3LYI1mUYaodgYAQLB773dww0V3xERFVkxBQmFtcWFldW
010d: 0tc2t5amFjaw==
011d: Proxy-Connection: Keep-Alive
013b: 
2012-Dec-03 16:00:24.617377:
<= Recv header, 0000000037 bytes (0x00000025)
0000: HTTP/1.0 200 Connection established
2012-Dec-03 16:00:24.617377:
<= Recv header, 0000000002 bytes (0x00000002)
0000: 
== Info: Proxy replied OK to CONNECT request
== Info: successfully set certificate verify locations:
== Info:   CAfile: <path to pem>
  CApath: none
== Info: SSLv3, TLS handshake, Client hello (1):
2012-Dec-03 16:00:25.657481:
=> Send SSL data, 0000000229 bytes (0x000000e5)
0040: 	<SSL data>
== Info: SSLv3, TLS handshake, Server hello (2):
2012-Dec-03 16:00:25.796495:
<= Recv SSL data, 0000000081 bytes (0x00000051)
0000: ...M..P..t8.v.E..1._..>....y .Y.I07.b1 '../#..........I.....1.B.
0040: .f...m...........
== Info: SSLv3, TLS handshake, CERT (11):
2012-Dec-03 16:00:25.796495:
<= Recv SSL data, 0000000590 bytes (0x0000024e)
0080: <information about SSL certificate>
== Info: SSLv3, TLS handshake, Server finished (14):
2012-Dec-03 16:00:25.796495:
<= Recv SSL data, 0000000004 bytes (0x00000004)
0000: ....
== Info: SSLv3, TLS handshake, Client key exchange (16):
2012-Dec-03 16:00:25.797495:
=> Send SSL data, 0000000070 bytes (0x00000046)
0000: ...B.@...b........6......*.C..@..&..2.C.9.y.O..........Z.6b....
0040: 5<E.x.
== Info: SSLv3, TLS change cipher, Client hello (1):
2012-Dec-03 16:00:25.797495:
=> Send SSL data, 0000000001 bytes (0x00000001)
0000: .
== Info: SSLv3, TLS handshake, Finished (20):
2012-Dec-03 16:00:25.797495:
=> Send SSL data, 0000000016 bytes (0x00000010)
0000: .....H..6.@.....
== Info: SSLv3, TLS change cipher, Client hello (1):
2012-Dec-03 16:00:25.932509:
<= Recv SSL data, 0000000001 bytes (0x00000001)
0000: .
== Info: SSLv3, TLS handshake, Finished (20):
2012-Dec-03 16:00:25.932509:
<= Recv SSL data, 0000000016 bytes (0x00000010)
0000: .......:.!q._.L5
== Info: SSL connection using SEED-SHA
== Info: Server certificate:
== Info: 	 SSL certificate verify ok.
2012-Dec-03 16:00:25.933509:
=> Send header, 0000000170 bytes (0x000000aa)
0000: POST <request to server> HTTP/1.1
0035: Host: <server url>
0056: Accept: */*
0063: Content-Length: 43
0077: Content-Type: application/x-www-form-urlencoded
00a8: 
2012-Dec-03 16:00:25.933509:
=> Send data, 0000000043 bytes (0x0000002b)
0000: <text data sent to server>
== Info: upload completely sent off: 43 out of 43 bytes
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000017 bytes (0x00000011)
0000: HTTP/1.1 200 OK
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000021 bytes (0x00000015)
0000: Server: nginx/1.3.7
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000037 bytes (0x00000025)
0000: Date: Mon, 03 Dec 2012 14:04:38 GMT
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000039 bytes (0x00000027)
0000: Content-Type: text/html;charset=UTF-8
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000019 bytes (0x00000013)
0000: Content-Length: 7
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000024 bytes (0x00000018)
0000: Connection: keep-alive
== Info: Added cookie JSESSIONID="356047E3CCD773A94959A4F32D8356AE" for domain <proxy host>, path /, expire 0
2012-Dec-03 16:00:28.188734:
<= Recv header, 0000000065 bytes (0x00000041)
0000: Set-Cookie: JSESSIONID=356047E3CCD773A94959A4F32D8356AE; Path=/
2012-Dec-03 16:00:28.189735:
<= Recv header, 0000000031 bytes (0x0000001f)
0000: Cache-Control: max-age=102600
2012-Dec-03 16:00:28.189735:
<= Recv header, 0000000040 bytes (0x00000028)
0000: Expires: Tue, 04 Dec 2012 18:30:25 GMT
2012-Dec-03 16:00:28.189735:
<= Recv header, 0000000023 bytes (0x00000017)
0000: Vary: Accept-Encoding
== Info: Keep sending data to get tossed away!
2012-Dec-03 16:00:28.189735:
<= Recv header, 0000000002 bytes (0x00000002)
0000: 
2012-Dec-03 16:00:28.189735:
<= Recv data, 0000000007 bytes (0x00000007)
0000: 9.2.0.1
== Info: Operation timed out after 100012 milliseconds with 7 out of 7 bytes received
== Info: Closing connection #0
== Info: SSLv3, TLS alert, Client hello (1):
2012-Dec-03 16:02:03.170232:
=> Send SSL data, 0000000002 bytes (0x00000002)
0000: ..
== Info: Timeout was reached