[ntp:questions] Detecting ntp broadcast packets

John Thurston john.thurston at alaska.gov
Tue Feb 26 18:58:06 UTC 2019

We don't run any ntp broadcast server. We don't have any intention of 
running one. In fact, I'd like to know if any such signal ever appears 
on my network.

Two ideas I had:
A) create a host with an ntpd 'broadcastclient' and then monitor its log 
output to see if it ever found a signal.

B) use snoop or tcpdump to look at broadcast packets and tell me if it 
uncovers any ntp

Is there already a better way to watch and warn of such packets?

    Do things because you should, not just because you can.

John Thurston    907-465-8591
John.Thurston at alaska.gov
Department of Administration
State of Alaska

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