The ability to block statistical P2P (NBAR 1889) as a category was disabled before the Holidays in 2022 as I noted in this response: https://community.meraki.com/t5/Security-SD-WAN/MX-NBAR-blocking-Statistical-Peer-to-peer-traffi/m-p/179500/highlight/true#M42349 This includes removing it from all aggregate or "All X" rules it may have been a part of
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