[ntp:questions] Originate Timestamp returned as zero

David Mills mills at udel.edu
Tue Dec 8 21:13:52 UTC 2009


If the orgin timestamp of a client packet is zero, the server will 
return it as zero, but the client will reject it (TEST3). However, the 
origin timestamp state variable in the association  is set to zero after 
the packet arrives and the timestamps used to calculate offset and 
delayh. This is to deflect a spurious replay of the previous client 
packet that might result in incorrect time.


David J Taylor wrote:

>Under what circumstances might an originate timestamp be returned as zero 
>from an NTP4 server?  Is it something wrong I put in the outgoing packet?
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