Nick Warne wrote:
My question? I still have people connecting, even though my firewall rules have blocked port 123 externally since that time?

Have you tried replying with a kiss-of-death packet? You won't get rid of all of those querying you, but as a considerable percentage of your clients are ntpds, you should be able to lessen the load a bit. Run ntpd for a few days with a configuration that replies with a KOD-packet to all queries and those who obey KOD packets should stop by then.

  Tapio
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