Windows and NTLM authentication

Andrew Bartlett abartlet at
Wed May 5 23:36:58 GMT 2004

On Tue, 2004-05-04 at 01:54, Tom Alsberg wrote:
> Hi there.
> Firstly:
> * When doing NTLM authentication, why is the challenge seen on the
>   network (sniffing/dump with Ethereal) different than the challenge
>   written to the log, and provided to the auth module as
>   context->

If you are using NTLM2 (an option under NTLMSSP), then the challenge is
derived from:

effective_chal = head(8, MD5(client_challenge, server_challenge))

Andrew Bartlett

Andrew Bartlett                                 abartlet at
Manager, Authentication Subsystems, Samba Team  abartlet at
Student Network Administrator, Hawker College   abartlet at
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url :

More information about the samba-technical mailing list