[ntp:questions] Bad NTP servers jeopardizing the pool.ntp.org initiative
mayer at ntp.isc.org
Wed Mar 28 04:04:16 UTC 2007
Wolfgang S. Rupprecht wrote:
> Jan Ceuleers <janspam.ceuleers at skynet.be> writes:
>> Wolfgang S. Rupprecht wrote:
>>> NTP could have some simple registration protocol if the pools folks
>>> wanted to open up the pools to dynamic hosts.
>> 't Wouldn't be NTP that has the registration protocol, 't would be the
> Perhaps I should rephrase that.
> "NTP could use a simple registration protocol if the pools
> folks wanted to open up the pools to dynamic hosts."
Please don't do this. If the server is not on a static IP address it has
no business serving NTP packets for the pool. In any case there is
currently no way for the NTP client to follow the change of the server
address. I have no plans to change this and it's almost impossible to
follow such a change anyway. Rereading the DNS list won't help you as
you are most likely going to get a different set of addresses from the
previous time you made a query (modulo the DNS resolver's caching the
results of the previous query).
This is a really bad idea.
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