aports/config/nftables/nft/inet/redxenfirewall/filter/input/stateful/dovecot

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tcp dport { 143, 993 } ct state new meter dovecot4 { ip saddr timeout 1h limit rate over 2/minute burst 20 packets } update @blackhole4 { ip saddr timeout 1h } counter;
tcp dport { 143, 993 } ct state new meter dovecot6 { ip6 saddr timeout 1h limit rate over 2/minute burst 20 packets } update @blackhole6 { ip6 saddr timeout 1h } counter;