Timotej Lazar
5762236ac2
The mgmt VRF might not exist yet when nftables rules are loaded, so use iifname instead of iif for dynamic interface lookup.
80 lines
2.6 KiB
Django/Jinja
80 lines
2.6 KiB
Django/Jinja
#!/usr/sbin/nft -f
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flush ruleset
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table inet filter {
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set cluster {
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type ipv4_addr; flags interval; auto-merge
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elements = {
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{{ nodes | map('device_address') | flatten | selectattr('family.value', '==', 4) | map(attribute='address') | join(',\n') | indent(12, first=True) }}
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}
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}
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set cluster/6 {
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type ipv6_addr; flags interval; auto-merge
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elements = {
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{{ nodes | map('device_address') | flatten | selectattr('family.value', '==', 6) | map(attribute='address') | join(',\n') | indent(12, first=True) }}
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}
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}
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# Just a temporary filter until we get our shit together policy-wise.
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set allowed {
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type ipv4_addr; flags interval
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elements = { 10.32.0.0/14, 193.2.76.176/24, 192.168.251.0/24, 88.200.23.0/24 }
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}
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set allowed/6 {
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type ipv6_addr; flags interval
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elements = { 2001:1470:fffd:3432::/64, 2001:1470:fffd:a000::/64 }
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}
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chain input {
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type filter hook input priority filter; policy drop
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ct state vmap { invalid : drop, established : accept, related : accept }
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iif lo accept
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ip protocol icmp icmp type {
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echo-request, echo-reply, destination-unreachable,
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parameter-problem, time-exceeded,
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} accept comment "accept some ICMPv4"
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ip6 nexthdr icmpv6 icmpv6 type {
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echo-request, echo-reply, destination-unreachable,
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packet-too-big, parameter-problem, time-exceeded,
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} accept comment "accept some ICMPv6"
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# BGP / BFD sessions
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iif lan0 ip6 saddr fe80::/64 accept
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iif lan1 ip6 saddr fe80::/64 accept
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ip saddr @cluster accept comment "accept connections from other nodes"
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ip6 saddr @cluster/6 accept comment "accept connections from other nodes"
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{% for service in services %}
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{% set prefixes = service | allowed_prefixes %}
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{% set prefixes4 = prefixes | selectattr('family.value', '==', 4) | map('string') %}
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{% set prefixes6 = prefixes | selectattr('family.value', '==', 6) | map('string') %}
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{% set ports = service.ports | compact_numlist %}
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# service {{ service.name }}
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{% if prefixes4 %}
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ip saddr { {{ prefixes4 | join(', ') }} } tcp dport { {{ ports }} } accept
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{% endif %}
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{% if prefixes6 %}
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ip6 saddr { {{ prefixes6 | join(', ') }} } tcp dport { {{ ports }} } accept
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{% endif %}
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{% endfor %}
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iifname mgmt accept comment "management access"
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ip saddr @allowed accept
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ip6 saddr @allowed/6 accept
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}
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chain forward {
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type filter hook forward priority filter; policy accept
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}
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chain output {
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type filter hook output priority filter; policy accept
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}
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}
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