[Samba] Custom SAMBA4/OpenChage ZEG applicance

[Andrew Bartlett]

On Sat, 2012-09-15 at 11:02 -0400, John Russell wrote:
> Ran wireshark on the XP client while joining the domain and saw SAM LOGON
> request from client and SAM Active Directory Response - user unknown.
> 
> I noticed on the request and the response packets the user name field in
> the packet is blank (yes, I am typing the user name and password into the
> prompt from the XP machine!).
> 
> Any ideas on what causes this? 

While an odd feature of the protocol, this is actually a normal
successful response to the expected packet.  (Essentially, this is a
historical oddity from a time when asking if a server knew about a user
over an un-authenticated UDP packet wasn't considered a
security/confidentially issue). 

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org