[ntp:questions] NPTdate - difference in packets between -q and not?

David J Taylor david-taylor at blueyonder.neither-this-bit.nor-this.co.uk
Sat Apr 4 15:04:03 UTC 2009

Richard B. Gilbert wrote:
> Routers sold into the consumer market generally have configuration
> options to allow or block ports and some can be configured to block
> specific IP addresses or address families.  By default they allow
> responses to outgoing packets and block all other incoming traffic.

Thanks, Richard.  I've not met domestic routers which require specific 
configuration for NTP packets, but perhaps I've just been lucky.  Would 
what you describe explain why ntpdate -q <remote> works, but nptdate 
<remote> responds with "no server suitable for synchronization found"?

[By works, I mean he gets a response like:

server, stratum 2, offset 12.016615, delay 0.05682
 4 Apr 08:49:58 ntpdate[3936]: step time server offset
12.016615 sec]


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