pdc chaining

  • Thread starter Thread starter Graham Turner
  • Start date Start date
G

Graham Turner

i think i have got the right AD parlance of "pdc chaining" for the scenario
of the process of a user authentication request being forwarded to the pdc
emulator when a local DC fails the authentication of the user logon

is anyone able to confirm the process of name resolution - is it a DNS query
(which i think it should be) or does it use a WINS 1B record lookup as
legacy Netbios applications used to do ??

GT
 
Hi Graham-

The order of name resolution is dependant upon your client version. W2K and
higher use DNS as primary. Earlier versions use WINS as primary.

--
Thanks,
Richard Moreno
MCSE NT4\2000, MCSA 2000

*This posting is provided "AS IS" with no warranties, and confers no
rights.
 
Not really familar with the term "pdc chaining" but if you have 10 dc's for
example (and say the pdc is #3) and a user changes their pw on #5. That dc
will then try to contact the pdc to notify it of the change, and will also
go ahead and write it into its database. If the user then logs off and back
on again and this time is being validated by dc #7, it will see a bad
username/pw etc, so before it denies logon, it will contact the pdc to see
if any changes were made that it has which just haven't replicated to it yet
before it denies logon.

However as indicated in the other post, dns will be the vehicle of choice
for xp and 2k.

--
David Brandt
Microsoft Corporation

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thanks both for responses

you both document dependency on "client version"

the communication of pdc chaining as i understood was DC to DC - both of
which are at w2k ?

GT
 
Hi Graham-

We are referencing as to the actual client used by the user. i.e. W2K Pro or
XP Pro. Not the server OS.

--
Thanks,
Richard Moreno
MCSE NT4\2000, MCSA 2000

*This posting is provided "AS IS" with no warranties, and confers no
rights.
 
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