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

Tapio Sokura oh2kku at iki.fi
Tue Dec 13 02:37:48 UTC 2005

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.


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