42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
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#!/usr/sbin/nft -f
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table inet filter
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delete table inet filter
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table inet filter {
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chain input {
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type filter hook input priority 0;
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# Accept any localhost traffic.
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iif lo accept;
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# Accept traffic originated from us.
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ct state established,related accept;
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# Allow ICMP packets.
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# Note that for IPv6 nd-neighbor-solicit, nd-router-advert, nd-neighbor-advert are needed to not break connectivity.
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ip6 nexthdr icmpv6 icmpv6 type { echo-request, destination-unreachable, packet-too-big, time-exceeded, parameter-problem, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } accept;
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ip protocol icmp icmp type { echo-request, destination-unreachable, router-advertisement, time-exceeded, parameter-problem } accept;
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# Drop invalid connections.
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ct state invalid drop;
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# TCP ports.
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tcp dport { {{ [ansible_port] | union(system_base_additional_tcp_ports) | join(", ") }} } ct state new accept;
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{% if system_base_udp_ports %}
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# UDP ports.
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udp dport { {{ system_base_udp_ports | join(", ") }} } accept;
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{% endif %}
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# Count and drop any other traffic.
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counter drop;
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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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