73 lines
3.3 KiB
Django/Jinja
73 lines
3.3 KiB
Django/Jinja
## {{ salt['pillar.get']('salt_managed', default='Salt Managed') }}
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{%- from "nftables/map.jinja" import nftables with context %}
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{%- from "nftables/map.jinja" import net with context %}
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## IPv4 filtering
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add table ip filter
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add chain ip filter INPUT { type filter hook input priority 0; policy drop; }
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add chain ip filter FORWARD { type filter hook forward priority 0; policy accept; }
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add chain ip filter OUTPUT { type filter hook output priority 0; policy accept; }
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add chain ip filter DOCKER
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add rule ip filter INPUT iifname lo counter accept
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add rule ip filter INPUT iifname tun* counter accept
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add rule ip filter INPUT ct state related,established counter accept
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add rule ip filter INPUT ip protocol icmp counter accept
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{%- for network in net.ip_networks+net.optional_ip_networks %}
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{%- if '.' in network %}
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add rule ip filter INPUT ip saddr {{ network }} ct state established,new counter accept
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{%- endif %}
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{%- endfor %}
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{%- for port in net.public_ports %}
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add rule ip filter INPUT {{ port.split('/')[0] }} dport {{ port.split('/')[1] }} ct state established,new counter accept
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{%- endfor %}
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{%- if nftables.log %}
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add rule ip filter INPUT counter log
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{%- endif %}
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## IPv4 NAT
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add table ip nat
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add chain ip nat PREROUTING { type nat hook prerouting priority dstnat; policy accept; }
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add chain ip nat INPUT { type nat hook input priority 1; policy accept; }
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add chain ip nat OUTPUT { type nat hook output priority -100; policy accept; }
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add chain ip nat POSTROUTING { type nat hook postrouting priority srcnat; policy accept; }
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add chain ip nat DOCKER
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### Main NAT rules
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{%- for network in net.nats %}
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add rule ip nat POSTROUTING ip saddr {{ network }} counter masquerade
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{%- endfor %}
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### Docker related rules
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add rule ip nat POSTROUTING oifname != "docker0" ip saddr 172.17.0.0/24 counter masquerade
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add rule ip nat PREROUTING fib daddr type local counter jump DOCKER
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add rule ip nat OUTPUT ip daddr != 127.0.0.0/8 fib daddr type local counter jump DOCKER
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add rule ip nat POSTROUTING iifname br-* counter masquerade
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add rule ip nat POSTROUTING iifname veth-* counter masquerade
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add rule ip nat DOCKER iifname "docker0" counter return
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## IPv6 filtering
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add table ip6 filter6
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add chain ip6 filter6 INPUT { type filter hook input priority 0; policy drop; }
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add chain ip6 filter6 FORWARD { type filter hook forward priority 0; policy accept; }
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add chain ip6 filter6 OUTPUT { type filter hook output priority 0; policy accept; }
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add rule ip6 filter6 INPUT iifname lo counter accept
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add rule ip6 filter6 INPUT iifname tun* counter accept
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add rule ip6 filter6 INPUT ct state related,established counter accept
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add rule ip6 filter6 INPUT icmpv6 type {destination-unreachable, packet-too-big, time-exceeded, echo-request, echo-reply, mld-listener-query, mld-listener-report, mld-listener-reduction, nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, nd-redirect, parameter-problem, router-renumbering} accept
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{%- for network in net.ip_networks %}
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{%- if ':' in network %}
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add rule ip6 filter6 INPUT ip6 saddr {{ network }} ct state established,new counter accept
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{%- endif %}
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{%- endfor %}
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{%- for port in net.public_ports %}
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add rule ip6 filter6 INPUT {{ port.split('/')[0] }} dport {{ port.split('/')[1] }} ct state established,new counter accept
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{%- endfor %}
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{%- if nftables.log %}
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add rule ip6 filter6 INPUT counter log
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{%- endif %}
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## Endline is mandatory
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