"Unexpected NTLM message Type 3 in new connection" for POST requests after several seconds

[Woodham]

I get the a "Unexpected NTLM message Type 3 in new connection" error when executing a POST request after an indeterminate amount of time on the same page.

The browser then requests a username and password, which doesn't work. (It just keeps requesting a username and password, and clicking cancel gives an unauthorized response).

This happens in Chrome, IE and Firefox.

GET requests all seem to work fine, however long you remain on the page before navigating to another one.

Example from logs:

[Thu Nov 08 10:11:42 2012] [info] [client 10.2.2.58] PYNTLM: Handling connection 0x4 from address 10.2.2.58 for POST URI /admin/general. 0 entries in connection cache., referer: http://iqa/admin/general
[Thu Nov 08 10:11:42 2012] [info] [client 10.2.2.58] PYTNLM: Spurious authentication request on connection 0x4. Method = POST. Content-Length = 0. Headers = {OMITTED}
[Thu Nov 08 10:11:42 2012] [info] [client 10.2.2.58] Unexpected NTLM message Type 3 in new connection from address 10.2.2.58 and URI /admin/general, referer: http://iqa/admin/general

[nueces]

I'm having the same problem with POST request, there is a workaround or something in where I can help? traceback, logs, etc?

[ghost]

Same problem here. Did either one of you manage to solve it?

[aliloubm]

Same problem .... :/

[aliloubm]

line 405 of pyntlm.py change

        if req.method!='POST' or req.clength>0:
            return apache.OK   

to
return apache.OK #if req.method!='POST' or req.clength>0:

I don't think it's a good idea but It works, just like that!

[JosefJezek]

I have same problem for post with absolute path.

ex. <form action="https://intranet/groups/create/step/group-details/" method="post">
Relative path is ok: 
<form action="/" method="post">

[mburtscher]

Same problem here, hack by @aliloubm "solves" the problem ...

[akovacs123]

It solved my problem, thanks for the hint. However, this is really out of my comfort zone, someone should make a correct solution and feed it back to the repository. :(

[peternewman]

I used to see a similar issue with POSTs on mod_ntlm, it's down to how IE handles them, see for example:
http://pinetik.blogspot.co.uk/2014/12/ie-post-empty-with-ntlm.html
https://www.sencha.com/forum/showthread.php?16086-NTLM-authentication-affects-IE-s-posting-capability
http://www.websina.com/bugzero/kb/browser-ie.html