[ntp:questions] ***SPAM*** Re: Bad NTP servers jeopardizing the pool.ntp.org initiative

Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200703 at gmail.com
Tue Mar 27 16:39:49 UTC 2007


"Maarten Wiltink" <maarten at kittensandcats.net> writes:
> For a service like NTP, making repeated UDP (connectionless) requests
> to the same host, a varying IP address on the server will never do.

It doesn't have to be that way though.  The voice over IP protocols
SIP and RTP deal with the same issues and they are also UDP.  They
just assume IP addresses will change and use a simple registration
protocol where the dynamically addressed daemons check in with the
"mother ship" periodically.  That tells the mother ship that the
telephone is available to receive calls and it also tells it which IP
address to send the calls to.

NTP could have some simple registration protocol if the pools folks
wanted to open up the pools to dynamic hosts.  It might be possible to
do something as simple as a prospective pool server's ntpd adding a
registration server run by the pools folks to the servers it polls.
When the registration server saw the ntpd request it could add the
pool server to the list of candidate servers.

Well, just tossing up ideas (and violating the rule never post before
the first cup of coffee hits the bloodstream.)

-wolfgang
-- 
Wolfgang S. Rupprecht                http://www.wsrcc.com/wolfgang/




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