Capacity of METERS in spoofed packets

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Hi, I'm using "meters" of nftables to apply rate-limit by source IP address with state "new" (ct state new - udp) this would block DoS attacks, but when it is a spoofed flood (IP addresses of random origin) in "nft list meter filter cnt-meter" thousands of IP addresses are displayed, how many ip does it support "meters", am I doing the right thing?

I have used "timeout 1s" in the meter.

I await your answer, thank you.

-Renzo cHv, PE.
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