On 08/19/2010 07:50 AM, Anssi Johansson wrote:
This approach may not be as effective as you think. In a typical ntpd setup with multiple upstream NTP servers, ntpd doesn't really care if one of the upstream servers goes insane. It's simply marked as bad, and the other servers are used instead. However, this doesn't reduce the traffic to the bad server at all -- it might even slightly increase in certain situations. If you really must do something "active" instead of just not responding to the requests, please consider using Kiss-of-Death (KoD) packets. This is the official method of telling clients to stop sending requests to the server. Please read http://tools.ietf.org/html/rfc5905#section-7.4 ntpd can also output these KoD packets with the proper configuration, there's no need for any external software.
Can anyone provide an NTP config that will give out KoD packets? I see it mentioned in the man page, but no explanation of how to do it.
-- Scott Baker - Canby Telcom System Administrator - RHCE - 503.266.8253 _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
