[ntp:questions] Issues with w32tm on AD network

David Woolley david at ex.djwhome.demon.co.uk.invalid
Tue Feb 26 22:14:58 UTC 2008


Evandro Menezes wrote:
> 
> No, but the workstations use an RPC to UDP port 445 or 137, not 123.
> W32TIME only uses the UDP port 123 when it's configured to be an NTP
> client or server, both disabled in my post above.
>
I don't think w32time is doing anything at all in that case.  If the 
workstations are using Windows Networking for their time (which they 
should not be in a modern Windows domain configuration) the support for 
that pre-dates w32time by a long way.  Modern workstations on modern 
Windows networks use their own copy of w32time, on port 123.

w32time's main reason for existence is not establishing a correct 
absolute time, but for ensuring that times are close enough for 
Microsoft's derivative of Kerberos works.




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