54 lines
1.6 KiB
Plaintext
54 lines
1.6 KiB
Plaintext
#!/usr/bin/nft -f
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# vim:set ts=2 sw=2 et:
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# IPv4/IPv6 Simple & Safe firewall ruleset.
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# More examples in /usr/share/nftables/ and /usr/share/doc/nftables/examples/.
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flush ruleset
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table inet filter {
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set LANv4 {
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type ipv4_addr
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flags interval
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elements = { 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 169.254.0.0/16 }
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}
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set LANv6 {
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type ipv6_addr
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flags interval
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elements = { fd00::/8, fe80::/10 }
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}
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chain input_lan {
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udp sport 1900 udp dport >= 1024 meta pkttype unicast limit rate 4/second burst 20 packets accept comment "Accept UPnP IGD port mapping reply"
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udp sport netbios-ns udp dport >= 1024 meta pkttype unicast accept comment "Accept Samba Workgroup browsing replies"
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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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ct state invalid drop comment "early drop of invalid connections"
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ct state {established, related} accept comment "allow tracked connections"
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iifname lo accept comment "allow from loopback"
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ip protocol icmp accept comment "allow icmp"
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meta l4proto ipv6-icmp accept comment "allow icmp v6"
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#tcp dport ssh accept comment "allow sshd"
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udp dport mdns ip6 daddr ff02::fb accept comment "Accept mDNS"
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udp dport mdns ip daddr 224.0.0.251 accept comment "Accept mDNS"
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pkttype host limit rate 5/second counter reject with icmpx type admin-prohibited
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ip6 saddr @LANv6 jump input_lan comment "Connections from private IP address ranges"
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ip saddr @LANv4 jump input_lan comment "Connections from private IP address ranges"
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counter
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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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}
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