mirror of
https://gitlab.alpinelinux.org/alpine/aports.git
synced 2025-04-20 01:26:38 +02:00
00a6ab48b5
https://wiki.nftables.org/wiki-nftables/index.php/Matching_packet_headers#Matching_IPv6_headers > Caution when using ip6 nexthdr, the value only refers to the next > header, i.e. ip6 nexthdr tcp will only match if the ipv6 packet does > not contain any extension headers.
81 lines
2 KiB
Text
81 lines
2 KiB
Text
#!/usr/sbin/nft -f
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# vim: set ts=4 sw=4:
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# You can find examples in /usr/share/nftables/.
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# Clear all prior state
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flush ruleset
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# Basic IPv4/IPv6 stateful firewall for server/workstation.
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table inet filter {
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chain input {
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type filter hook input priority 0; policy drop;
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iifname lo accept \
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comment "Accept any localhost traffic"
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ct state { established, related } accept \
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comment "Accept traffic originated from us"
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ct state invalid drop \
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comment "Drop invalid connections"
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tcp dport 113 reject with icmpx type port-unreachable \
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comment "Reject AUTH to make it fail fast"
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# ICMPv4
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ip protocol icmp icmp type {
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echo-reply, # type 0
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destination-unreachable, # type 3
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echo-request, # type 8
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time-exceeded, # type 11
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parameter-problem, # type 12
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} accept \
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comment "Accept ICMP"
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# ICMPv6
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icmpv6 type {
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destination-unreachable, # type 1
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packet-too-big, # type 2
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time-exceeded, # type 3
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parameter-problem, # type 4
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echo-request, # type 128
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echo-reply, # type 129
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} accept \
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comment "Accept basic IPv6 functionality"
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icmpv6 type {
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nd-router-solicit, # type 133
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nd-router-advert, # type 134
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nd-neighbor-solicit, # type 135
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nd-neighbor-advert, # type 136
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} ip6 hoplimit 255 accept \
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comment "Allow IPv6 SLAAC"
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icmpv6 type {
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mld-listener-query, # type 130
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mld-listener-report, # type 131
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mld-listener-reduction, # type 132
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mld2-listener-report, # type 143
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} ip6 saddr fe80::/10 accept \
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comment "Allow IPv6 multicast listener discovery on link-local"
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ip6 saddr fe80::/10 udp sport 547 udp dport 546 accept \
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comment "Accept DHCPv6 replies from IPv6 link-local addresses"
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}
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chain forward {
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type filter hook forward priority 0; policy drop;
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}
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chain output {
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type filter hook output priority 0; policy accept;
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}
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}
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# The state of stateful objects saved on the nftables service stop.
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include "/var/lib/nftables/*.nft"
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# Rules
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include "/etc/nftables.d/*.nft"
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