58 lines
1.4 KiB
Plaintext
58 lines
1.4 KiB
Plaintext
#!/usr/bin/nft -f
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flush ruleset
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table inet filter {
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chain prerouting-raw {
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type filter hook prerouting priority raw
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iif lo notrack
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tcp dport {22, 25, 80, 465, 993} notrack
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ip protocol icmp notrack
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meta l4proto ipv6-icmp notrack
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}
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chain output-raw {
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type filter hook output priority raw
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oif lo notrack
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tcp sport {22, 25, 80, 465, 993} notrack
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ip protocol icmp notrack
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meta l4proto ipv6-icmp notrack
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}
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chain input {
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type filter hook input priority filter
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policy drop
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iif lo accept
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tcp dport {22, 25, 80, 465, 993} accept
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ip protocol icmp accept
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meta l4proto ipv6-icmp accept
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ct state vmap { invalid : drop, established : accept, related : accept }
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meta l4proto udp reject
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meta l4proto tcp reject with tcp reset
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reject
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}
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chain forward {
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type filter hook forward priority filter
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policy drop
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}
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chain output {
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type filter hook output priority filter
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skuid {opendkim, opendmarc, policyd-spf} oif lo meta l4proto {tcp, udp} th dport 53 accept
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skuid != {root, systemd-network, chrony, unbound, postfix, dovecot, dovenull} counter goto output-reject
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}
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chain output-reject {
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meta l4proto udp reject
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meta l4proto tcp reject with tcp reset
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reject
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}
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}
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