> > -A INPUT --protocol udp --dport ntp --match limit --limit 5/min --jump LOG
> > --log-level debug --log-prefix "Dropped, NTP ratelimit: "
> 
> Will that let through all 8 packets from an iburst?

Ooops. You are right.
First I gave --hashlimit-burst 10 but later I deleted it.

> How much kernel memory will that use on a busy server?

Actually I don't know.

> How do things like "--limit 5/min" actually work?  Or where are the details 
> described?

This would not distinguish packets from different sources.

Gabor
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