bundles/nftables: store rules in dedicated files instead of nftables.conf
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11 changed files with 77 additions and 102 deletions
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@ -37,20 +37,18 @@ def get_static_allocations(metadata):
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@metadata_reactor.provides(
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'nftables/rules/input/dhcpd',
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'nftables/rules/10-dhcpd',
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)
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def nftables(metadata):
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rules = set()
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for iface in node.metadata.get('dhcpd/subnets', {}):
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rules.add(f'udp dport {{ 67, 68 }} iif {iface} accept')
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rules.add(f'inet filter input udp dport {{ 67, 68 }} iif {iface} accept')
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return {
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'nftables': {
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'rules': {
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'input': {
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# can't use port_rules here, because we're generating interface based rules.
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'dhcpd': sorted(rules),
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},
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# can't use port_rules here, because we're generating interface based rules.
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'10-dhcpd': sorted(rules),
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},
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}
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}
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@ -19,14 +19,6 @@ table inet filter {
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ip protocol icmp accept
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ip6 nexthdr ipv6-icmp accept
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% for ruleset, rules in sorted(node.metadata.get('nftables/rules/input', {}).items()):
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# ${ruleset}
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% for rule in rules:
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${rule}
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% endfor
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# / ${ruleset}
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% endfor
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}
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chain output {
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@ -40,32 +32,15 @@ table inet filter {
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icmp type timestamp-request drop
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icmp type timestamp-reply drop
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% for ruleset, rules in sorted(node.metadata.get('nftables/rules/forward', {}).items()):
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# ${ruleset}
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% for rule in rules:
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${rule}
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% endfor
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# / ${ruleset}
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% endfor
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}
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}
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table nat {
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chain prerouting {
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type nat hook prerouting priority -100
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% for rule in sorted(node.metadata.get('nftables/rules/nat_prerouting', [])):
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${rule}
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% endfor
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}
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chain postrouting {
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type nat hook postrouting priority 100
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% for rule in sorted(node.metadata.get('nftables/rules/nat_postrouting', [])):
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${rule}
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% endfor
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}
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}
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3
bundles/nftables/files/rules-template
Normal file
3
bundles/nftables/files/rules-template
Normal file
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@ -0,0 +1,3 @@
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% for rule in rules:
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add rule ${rule}
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% endfor
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@ -15,7 +15,6 @@ directories = {
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files = {
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'/etc/nftables.conf': {
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'content_type': 'mako',
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'needs': {
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'directory:/etc/nftables-rules.d',
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},
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@ -30,9 +29,23 @@ files = {
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'svc_systemd:nftables:reload',
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},
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},
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}
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for ruleset, rules in node.metadata.get('nftables/rules', {}).items():
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files[f'/etc/nftables-rules.d/{ruleset}'] = {
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'source': 'rules-template',
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'content_type': 'mako',
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'context': {
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'rules': rules,
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},
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'needed_by': {
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'svc_systemd:nftables',
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},
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'triggers': {
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'svc_systemd:nftables:reload',
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},
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}
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svc_systemd = {
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'nftables': {
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'needs': {
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@ -9,12 +9,13 @@ defaults = {
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'pacman': {
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'packages': {
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'nftables': {},
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'iptables': {
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'installed': False,
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'needed_by': {
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'pkg_pacman:iptables-nft',
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},
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},
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# https://github.com/bundlewrap/bundlewrap/issues/688
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# 'iptables': {
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# 'installed': False,
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# 'needed_by': {
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# 'pkg_pacman:iptables-nft',
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# },
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# },
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'iptables-nft': {
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'needed_by': {
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'pkg_pacman:nftables',
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@ -34,7 +35,7 @@ if not node.has_bundle('vmhost'):
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}
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@metadata_reactor.provides(
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'nftables/rules/input/port_rules',
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'nftables/rules/99-port_rules',
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)
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def port_rules_to_nftables(metadata):
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# Using this, bundles can simply set up port based rules. This
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@ -63,36 +64,33 @@ def port_rules_to_nftables(metadata):
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if port != '*':
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if ':' in port:
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parts = port.split(':')
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port_str = f'dport {{ {parts[0]}-{parts[1]} }} '
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port_str = f'{proto} dport {{ {parts[0]}-{parts[1]} }}'
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else:
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port_str = f'dport {port} '
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prefix = ''
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port_str = f'{proto} dport {port}'
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else:
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port_str = ''
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prefix = 'meta l4proto '
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port_str = f'meta l4proto {proto}'
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if target == '*':
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ruleset.add(f'{prefix}{proto} {port_str}accept {comment}')
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elif target == 'ipv4':
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ruleset.add(f'{prefix}{proto} {port_str}ip version 4 accept {comment}')
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elif target == 'ipv6':
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ruleset.add(f'{prefix}{proto} {port_str}ip6 version 6 accept {comment}')
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if target in ('ipv4', 'ipv6'):
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version_str = f'meta nfproto {target}'
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else:
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version_str = ''
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if target in ('*', 'ipv4', 'ipv6'):
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ruleset.add(f'inet filter input {version_str} {port_str} accept {comment}')
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else:
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resolved = repo.libs.tools.resolve_identifier(repo, target)
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for address in resolved['ipv4']:
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ruleset.add(f'{prefix}{proto} {port_str}ip saddr {address} accept {comment}')
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ruleset.add(f'inet filter input meta nfproto ipv4 {port_str} ip saddr {address} accept {comment}')
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for address in resolved['ipv6']:
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ruleset.add(f'{prefix}{proto} {port_str}ip6 saddr {address} accept {comment}')
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ruleset.add(f'inet filter input meta nfproto ipv6 {port_str} ip6 saddr {address} accept {comment}')
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return {
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'nftables': {
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'rules': {
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# order does not matter here.
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'input': {
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'port_rules': sorted(ruleset),
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},
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'99-port_rules': sorted(ruleset),
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},
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},
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}
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@ -6,12 +6,10 @@ defaults = {
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},
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'nftables': {
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'rules': {
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'input': {
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'wide-dhcp6c': [
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'udp dport { 546, 547 } ip6 saddr ff00::/12 accept',
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'udp dport { 546, 547 } ip6 saddr fe80::/10 accept',
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],
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},
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'10-wide-dhcp6c': [
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'inet filter input udp dport { 546, 547 } ip6 saddr ff00::/12 accept',
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'inet filter input udp dport { 546, 547 } ip6 saddr fe80::/10 accept',
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],
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},
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},
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'icinga2_api': {
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@ -18,16 +18,6 @@ defaults = {
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},
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},
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},
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'nftables': {
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'rules': {
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'forward': {
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'wireguard': [
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'iif wg0 accept',
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'oif wg0 accept',
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],
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},
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},
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},
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'wireguard': {
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'privatekey': repo.libs.keys.gen_privkey(repo, f'{node.name} wireguard privatekey'),
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},
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@ -221,17 +211,20 @@ def interface_ips(metadata):
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@metadata_reactor.provides(
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'nftables/rules/nat_postrouting',
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'nftables/rules/10-wireguard',
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)
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def snat(metadata):
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if not node.has_bundle('nftables'):
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raise DoNotRunAgain
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rules = set()
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rules = {
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'inet filter forward iif wg0 accept',
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'inet filter forward oif wg0 accept',
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}
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for config in metadata.get('wireguard/peers', {}).values():
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if 'snat_to' in config:
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rules.add('ip saddr {} ip daddr != {} snat to {}'.format(
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rules.add('nat postrouting ip saddr {} ip daddr != {} snat to {}'.format(
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config['my_ip'],
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config['their_ip'],
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config['snat_to'],
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@ -240,7 +233,7 @@ def snat(metadata):
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return {
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'nftables': {
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'rules': {
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'nat_postrouting': rules,
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'10-wireguard': sorted(rules),
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},
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},
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}
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@ -102,21 +102,17 @@ nodes['home.router'] = {
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},
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'nftables': {
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'rules': {
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'forward': {
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'router': [
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# This is a router. Allow forwarding traffic for internal networks.
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'ct state { related, established } accept',
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'iif enp1s0.23 oif ppp0 accept',
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'iif enp1s0.42 accept',
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'50-router': [
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# This is a router. Allow forwarding traffic for internal networks.
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'inet filter forward ct state { related, established } accept',
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'inet filter forward iif enp1s0.23 oif ppp0 accept',
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'inet filter forward iif enp1s0.42 accept',
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# yaaaaay, IPv6! No NAT!
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'ip6 nexthdr ipv6-icmp accept',
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'tcp dport 22 accept',
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],
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},
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'nat_prerouting': {
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'tcp dport 2022 dnat 172.19.138.20:22',
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},
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# yaaaaay, IPv6! No NAT!
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'inet filter forward ip6 nexthdr ipv6-icmp accept',
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'inet filter forward tcp dport 22 accept',
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'nat prerouting tcp dport 2022 dnat 172.19.138.20:22',
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],
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},
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},
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'nginx': {
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@ -51,6 +51,11 @@ nodes['htz-cloud.influxdb'] = {
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},
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},
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},
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#'openssh': {
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# 'restrict-to': {
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# 'versatel',
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# },
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#},
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'vm': {
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'cpu': 1,
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'ram': 2,
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@ -181,12 +181,10 @@ nodes['htz-cloud.miniserver'] = {
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},
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'nftables': {
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'rules': {
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'input': {
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'sophie-weechat': [
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'udp dport { 60000-61000 } accept',
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'tcp dport 9001 accept',
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],
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},
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'50-sophie-weechat': [
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'inet filter input udp dport { 60000-61000 } accept',
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'inet filter input tcp dport 9001 accept',
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],
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},
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},
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'nginx': {
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@ -275,12 +275,10 @@ nodes['rx300'] = {
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},
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'nftables': {
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'rules': {
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'input': {
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'kunsi-weechat': [
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'udp dport { 60000-61000 } accept',
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'tcp dport 9001 accept',
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],
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},
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'50-kunsi-weechat': [
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'inet filter input udp dport { 60000-61000 } accept',
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'inet filter input tcp dport 9001 accept',
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],
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},
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},
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'nginx': {
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