[ntp:questions] Re: Why so many dead NTP servers in pool.ntp.org?

Tom Smith smith at cag.zko.hp.com
Tue Dec 13 04:41:10 UTC 2005

Tapio Sokura wrote:
> Raphae wrote:
>> when running the command
>> # ntptrace pool.ntp.org
>> more than half of the servers in the pool seem to be dead.  Isn't
> Are you sure that they are dead, or just not responding to NTP control 
> mode (mode 6) packets? Because mode 6 is what ntptrace uses, when the 
> actual NTP time queries are sent/received using modes 1-5. All pool 
> servers that I just tried did answer to normal time queries (mode 3) 
> just fine. Some server operators choose to restrict mode 6 queries, that 
> is completely acceptable by the pool rules.
>   Tapio

Yes. "ntpdate -q [server]" is a better test.

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