66 lines
2.1 KiB
Plaintext
66 lines
2.1 KiB
Plaintext
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#!/usr/sbin/nft -f
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flush ruleset
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table inet filter {
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chain inbound_ipv4 {
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# accepting ping (icmp-echo-request) for diagnostic purposes.
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# However, it also lets probes discover this host is alive.
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# This sample accepts them within a certain rate limit:
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#
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# icmp type echo-request limit rate 5/second accep
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}
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chain inbound_ipv6 {
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# accept neighbour discovery otherwise connectivity breaks
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#
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icmpv6 type { nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert } accept
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# accepting ping (icmpv6-echo-request) for diagnostic purposes.
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# However, it also lets probes discover this host is alive.
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# This sample accepts them within a certain rate limit:
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#
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# icmpv6 type echo-request limit rate 5/second accept
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}
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chain inbound {
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# By default, drop all traffic unless it meets a filter
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# criteria specified by the rules that follow below.
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type filter hook input priority 0; policy drop;
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# Allow traffic from established and related packets, drop invalid
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ct state vmap { established : accept, related : accept, invalid : drop }
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# Allow loopback traffic.
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iifname lo accept
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# Jump to chain according to layer 3 protocol using a verdict map
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meta protocol vmap { ip : jump inbound_ipv4, ip6 : jump inbound_ipv6 }
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# Allow SSH on port TCP/22 and allow HTTP(S) TCP/80 and TCP/443
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# for IPv4 and IPv6.
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tcp dport { 22, 80, 443, 9090 } accept
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# Uncomment to enable logging of denied inbound traffic
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# log prefix "[nftables] Inbound Denied: " counter drop
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}
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chain forward {
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# Drop everything (assumes this device is not a router)
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type filter hook forward priority 0; policy drop;
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}
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chain input {
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type filter hook input priority 0;
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}
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chain forward {
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type filter hook forward priority 0;
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}
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chain output {
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type filter hook output priority 0;
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}
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}
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