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rework firewall setup

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This commit is contained in:
Franzi 2023-09-24 20:59:58 +02:00
parent be62c1270f
commit cd48cf495d
Signed by: kunsi
GPG key ID: 12E3D2136B818350
30 changed files with 145 additions and 122 deletions
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2
bundles/bird/metadata.py
View file

@ -88,7 +88,7 @@ def firewall(metadata):
return {
'firewall': {
'port_rules': {
'179': atomic(sources),
'179/tcp': atomic(sources),
},
},
}

12
bundles/dovecot/metadata.py
View file

@ -76,19 +76,19 @@ def import_database_settings_from_postfixadmin(metadata):
@metadata_reactor.provides(
'firewall/port_rules/143',
'firewall/port_rules/993',
'firewall/port_rules/4190',
'firewall/port_rules',
'firewall/port_rules',
'firewall/port_rules',
)
def firewall(metadata):
return {
'firewall': {
'port_rules': {
# imap(s)
'143': atomic(metadata.get('dovecot/restrict-to', {'*'})),
'993': atomic(metadata.get('dovecot/restrict-to', {'*'})),
'143/tcp': atomic(metadata.get('dovecot/restrict-to', {'*'})),
'993/tcp': atomic(metadata.get('dovecot/restrict-to', {'*'})),
# managesieve
'4190': atomic(metadata.get('dovecot/restrict-to', {'*'})),
'4190/tcp': atomic(metadata.get('dovecot/restrict-to', {'*'})),
},
},
}

6
bundles/kea-dhcp-server/metadata.py
View file

@ -66,16 +66,16 @@ def get_static_allocations(metadata):
@metadata_reactor.provides(
'nftables/rules/10-kea-dhcp-server',
'nftables/input/10-kea-dhcp-server',
)
def nftables(metadata):
rules = set()
for iface in node.metadata.get('kea-dhcp-server/subnets', {}):
rules.add(f'inet filter input udp dport {{ 67, 68 }} iif {iface} accept')
rules.add(f'udp dport {{ 67, 68 }} iifname {iface} accept')
return {
'nftables': {
'rules': {
'input': {
# can't use port_rules here, because we're generating interface based rules.
'10-kea-dhcp-server': sorted(rules),
},

8
bundles/kodi/metadata.py
View file

@ -43,15 +43,15 @@ defaults = {
@metadata_reactor.provides(
'firewall/port_rules/8080',
'firewall/port_rules/9090',
'firewall/port_rules',
'firewall/port_rules',
)
def firewall(metadata):
return {
'firewall': {
'port_rules': {
'8080': atomic(metadata.get('kodi/restrict-to', {'*'})),
'9090': atomic(metadata.get('kodi/restrict-to', {'*'})),
'8080/tcp': atomic(metadata.get('kodi/restrict-to', {'*'})),
'9090/tcp': atomic(metadata.get('kodi/restrict-to', {'*'})),
},
},
}

4
bundles/minecraft/metadata.py
View file

@ -150,13 +150,13 @@ def heap_to_java_opts(metadata):
@metadata_reactor.provides(
'firewall/port_rules/25565',
'firewall/port_rules',
)
def firewall(metadata):
return {
'firewall': {
'port_rules': {
'25565': atomic(metadata.get('minecraft/restrict-to', set())),
'25565/tcp': atomic(metadata.get('minecraft/restrict-to', set())),
},
},
}

2
bundles/mosquitto/metadata.py
View file

@ -33,7 +33,7 @@ def firewall(metadata):
result = {}
for listener in metadata.get('mosquitto/listeners').keys():
result[listener] = atomic(sources)
result[f'{listener}/tcp'] = atomic(sources)
return {
'firewall': {

4
bundles/nfs-server/metadata.py
View file

@ -33,8 +33,8 @@ def firewall(metadata):
ips.add(share_target)
rules = {}
for port in ('111', '2049', '1110', '4045', '35295'): # TODO find out if we need more ports
for proto in ('', '/udp'):
for port in ('111', '2049', '1110', '4045', '35295'):
for proto in ('/tcp', '/udp'):
rules[port + proto] = atomic(ips)
return {

28
bundles/nftables/files/nftables.conf
View file

@ -19,6 +19,13 @@ table inet filter {
ip protocol icmp accept
ip6 nexthdr ipv6-icmp accept
% for ruleset, rules in sorted(input.items()):
# ${ruleset}
% for rule in rules:
${rule}
% endfor
% endfor
}
chain output {
@ -32,15 +39,36 @@ table inet filter {
icmp type timestamp-request drop
icmp type timestamp-reply drop
% for ruleset, rules in sorted(forward.items()):
# ${ruleset}
% for rule in rules:
${rule}
% endfor
% endfor
}
}
table nat {
chain prerouting {
type nat hook prerouting priority -100
% for ruleset, rules in sorted(prerouting.items()):
# ${ruleset}
% for rule in rules:
${rule}
% endfor
% endfor
}
chain postrouting {
type nat hook postrouting priority 100
% for ruleset, rules in sorted(postrouting.items()):
# ${ruleset}
% for rule in rules:
${rule}
% endfor
% endfor
}
}

23
bundles/nftables/items.py
View file

@ -15,8 +15,12 @@ directories = {
files = {
'/etc/nftables.conf': {
'needs': {
'directory:/etc/nftables-rules.d',
'content_type': 'mako',
'context': {
'forward': node.metadata.get('nftables/forward', {}),
'input': node.metadata.get('nftables/input', {}),
'postrouting': node.metadata.get('nftables/postrouting', {}),
'prerouting': node.metadata.get('nftables/prerouting', {}),
},
'triggers': {
'svc_systemd:nftables:reload',
@ -32,21 +36,6 @@ files = {
},
}
for ruleset, rules in node.metadata.get('nftables/rules', {}).items():
files[f'/etc/nftables-rules.d/{ruleset}'] = {
'source': 'rules-template',
'content_type': 'mako',
'context': {
'rules': rules,
},
'needed_by': {
'svc_systemd:nftables',
},
'triggers': {
'svc_systemd:nftables:reload',
},
}
svc_systemd = {
'nftables': {
'needs': {

31
bundles/nftables/metadata.py
View file

@ -35,7 +35,7 @@ if not node.has_bundle('vmhost'):
}
@metadata_reactor.provides(
'nftables/rules/99-port_rules',
'nftables/input/99-port_rules',
)
def port_rules_to_nftables(metadata):
# Using this, bundles can simply set up port based rules. This
@ -49,15 +49,19 @@ def port_rules_to_nftables(metadata):
if '/' in portdef:
port, proto = portdef.split('/', 2)
if proto not in {'udp'}:
if proto not in ('tcp', 'udp'):
raise BundleError(f'firewall/port_rules: illegal identifier {portdef} in metadata for {node.name}')
else:
port = portdef
proto = 'tcp'
proto = None
for target in targets:
if port == '*' and target == '*':
raise BundleError('firewall/port_rules: setting both port and target to * is unsupported')
if (
(port == '*' and target == '*')
or (target == '*' and proto is None)
or (port != '*' and proto is None)
):
raise BundleError(f'firewall/port_rules: illegal combination of port, target and protocol: "{port}" "{target}" "{proto}"')
comment = f'comment "port_rules {target}"'
@ -67,28 +71,25 @@ def port_rules_to_nftables(metadata):
port_str = f'{proto} dport {{ {parts[0]}-{parts[1]} }} '
else:
port_str = f'{proto} dport {port} '
else:
elif proto is not None:
port_str = f'meta l4proto {proto} '
if target in ('ipv4', 'ipv6'):
version_str = f'meta nfproto {target}'
else:
version_str = ''
port_str = ''
if target in ('*', 'ipv4', 'ipv6'):
ruleset.add(f'inet filter input {version_str} {port_str} accept {comment}')
if target == '*':
ruleset.add(f'{port_str}accept {comment}')
else:
resolved = repo.libs.tools.resolve_identifier(repo, target, linklocal=True)
for address in resolved['ipv4']:
ruleset.add(f'inet filter input meta nfproto ipv4 {port_str} ip saddr {address} accept {comment}')
ruleset.add(f'{port_str}ip saddr {address} accept {comment}')
for address in resolved['ipv6']:
ruleset.add(f'inet filter input meta nfproto ipv6 {port_str} ip6 saddr {address} accept {comment}')
ruleset.add(f'{port_str}ip6 saddr {address} accept {comment}')
return {
'nftables': {
'rules': {
'input': {
# order does not matter here.
'99-port_rules': sorted(ruleset),
},

8
bundles/nginx/metadata.py
View file

@ -172,15 +172,15 @@ def monitoring(metadata):
@metadata_reactor.provides(
'firewall/port_rules/80',
'firewall/port_rules/443',
'firewall/port_rules',
'firewall/port_rules',
)
def firewall(metadata):
return {
'firewall': {
'port_rules': {
'80': atomic(metadata.get('nginx/restrict-to', {'*'})),
'443': atomic(metadata.get('nginx/restrict-to', {'*'})),
'80/tcp': atomic(metadata.get('nginx/restrict-to', {'*'})),
'443/tcp': atomic(metadata.get('nginx/restrict-to', {'*'})),
},
},
}

4
bundles/oidentd/metadata.py
View file

@ -10,13 +10,13 @@ defaults = {
@metadata_reactor.provides(
'firewall/port_rules/113',
'firewall/port_rules',
)
def firewall(metadata):
return {
'firewall': {
'port_rules': {
'113': atomic(metadata.get('oidentd/restrict-to', {'*'})),
'113/tcp': atomic(metadata.get('oidentd/restrict-to', {'*'})),
},
},
}

4
bundles/openssh/metadata.py
View file

@ -16,13 +16,13 @@ defaults = {
}
@metadata_reactor.provides(
'firewall/port_rules/22',
'firewall/port_rules',
)
def firewall(metadata):
return {
'firewall': {
'port_rules': {
'22': atomic(metadata.get('openssh/restrict-to', {'*'})),
'22/tcp': atomic(metadata.get('openssh/restrict-to', {'*'})),
},
},
}

16
bundles/postfix/metadata.py
View file

@ -96,10 +96,10 @@ def letsencrypt(metadata):
@metadata_reactor.provides(
'firewall/port_rules/25',
'firewall/port_rules/465',
'firewall/port_rules/587',
'firewall/port_rules/2525',
'firewall/port_rules',
'firewall/port_rules',
'firewall/port_rules',
'firewall/port_rules',
)
def firewall(metadata):
if node.has_bundle('postfixadmin'):
@ -108,13 +108,13 @@ def firewall(metadata):
default = metadata.get('postfix/mynetworks', set())
rules = {
'25': atomic(metadata.get('postfix/restrict-to', default)),
'465': atomic(metadata.get('postfix/restrict-to', default)),
'25/tcp': atomic(metadata.get('postfix/restrict-to', default)),
'465/tcp': atomic(metadata.get('postfix/restrict-to', default)),
}
if node.has_bundle('postfixadmin'):
rules['587'] = atomic(metadata.get('postfix/restrict-to', default))
rules['2525'] = atomic(metadata.get('postfix/restrict-to', default))
rules['587/tcp'] = atomic(metadata.get('postfix/restrict-to', default))
rules['2525/tcp'] = atomic(metadata.get('postfix/restrict-to', default))
return {
'firewall': {

4
bundles/powerdns/metadata.py
View file

@ -201,9 +201,9 @@ def firewall(metadata):
return {
'firewall': {
'port_rules': {
'53': atomic(metadata.get('powerdns/restrict-to/dns', {'*'})),
'53/tcp': atomic(metadata.get('powerdns/restrict-to/dns', {'*'})),
'53/udp': atomic(metadata.get('powerdns/restrict-to/dns', {'*'})),
'8081': atomic(metadata.get('powerdns/restrict-to/api', set())),
'8081/tcp': atomic(metadata.get('powerdns/restrict-to/api', set())),
},
},
}

2
bundles/pppd/files/ip-up
View file

@ -2,7 +2,7 @@
INTERFACE=$1
echo "add rule nat postrouting oif $INTERFACE masquerade" > /etc/nftables-rules.d/90-pppd
echo "add rule nat postrouting oifname $INTERFACE masquerade" > /etc/nftables-rules.d/90-pppd
% for rule in sorted(nftables):
echo "add rule ${rule}" >> /etc/nftables-rules.d/90-pppd
% endfor

2
bundles/rsyslogd/metadata.py
View file

@ -25,7 +25,7 @@ def firewall(metadata):
return {
'firewall': {
'port_rules': {
'514': atomic(metadata.get('rsyslogd/restrict-to', set())),
'514/tcp': atomic(metadata.get('rsyslogd/restrict-to', set())),
'514/udp': atomic(metadata.get('rsyslogd/restrict-to', set())),
},
},

6
bundles/transmission/metadata.py
View file

@ -55,9 +55,9 @@ def firewall(metadata):
return {
'firewall': {
'port_rules': {
str(metadata.get('transmission/config/peer-port')): atomic({'*'}),
str(metadata.get('transmission/config/peer-port')) + '/udp': atomic({'*'}),
str(metadata.get('transmission/config/rpc-port')): atomic(metadata.get('transmission/restrict-to', {'*'})),
f"{metadata.get('transmission/config/peer-port')}/tcp": atomic({'*'}),
f"{metadata.get('transmission/config/peer-port')}/udp": atomic({'*'}),
f"{metadata.get('transmission/config/rpc-port')}/tcp": atomic(metadata.get('transmission/restrict-to', {'*'})),
},
},
}

2
bundles/unbound/metadata.py
View file

@ -70,7 +70,7 @@ def firewall(metadata):
return {
'firewall': {
'port_rules': {
'53': atomic(metadata.get('unbound/restrict-to', set())),
'53/tcp': atomic(metadata.get('unbound/restrict-to', set())),
'53/udp': atomic(metadata.get('unbound/restrict-to', set())),
},
},

6
bundles/weechat/metadata.py
View file

@ -20,9 +20,9 @@ defaults = {
},
},
'nftables': {
'rules': {
'weechat-mosh': {
'inet filter input udp dport { 60000-61000 } accept',
'input': {
'10-weechat': {
'udp dport { 60000-61000 } accept',
},
},
},

6
bundles/wide-dhcp6c/metadata.py
View file

@ -5,10 +5,10 @@ defaults = {
},
},
'nftables': {
'rules': {
'input': {
'10-wide-dhcp6c': [
'inet filter input udp dport { 546, 547 } ip6 saddr ff00::/12 accept',
'inet filter input udp dport { 546, 547 } ip6 saddr fe80::/10 accept',
'udp dport { 546, 547 } ip6 saddr ff00::/12 accept',
'udp dport { 546, 547 } ip6 saddr fe80::/10 accept',
],
},
},

19
bundles/wireguard/metadata.py
View file

@ -264,7 +264,8 @@ def interface_ips(metadata):
@metadata_reactor.provides(
'nftables/rules/10-wireguard',
'nftables/forward/10-wireguard',
'nftables/postrouting/10-wireguard',
)
def snat(metadata):
if not node.has_bundle('nftables') or node.os == 'arch':
@ -272,13 +273,14 @@ def snat(metadata):
snat_ip = metadata.get('wireguard/snat_ip', None)
rules = set()
forward = set()
postrouting = set()
for peer, config in sorted(metadata.get('wireguard/peers', {}).items()):
rules.add(f'inet filter forward iifname wg_{config["iface"]} accept')
rules.add(f'inet filter forward oifname wg_{config["iface"]} accept')
forward.add(f'iifname wg_{config["iface"]} accept')
forward.add(f'oifname wg_{config["iface"]} accept')
if snat_ip:
rules.add('nat postrouting ip saddr {} ip daddr != {} snat to {}'.format(
postrouting.add('ip saddr {} ip daddr != {} snat to {}'.format(
config['my_ip'],
config['their_ip'],
snat_ip,
@ -286,8 +288,11 @@ def snat(metadata):
return {
'nftables': {
'rules': {
'10-wireguard': sorted(rules),
'forward': {
'10-wireguard': sorted(forward),
},
'postrouting': {
'10-wireguard': sorted(postrouting),
},
},
}

3
groups/os.py
View file

@ -41,9 +41,6 @@ groups['linux'] = {
'*': {
'icinga2',
},
'*/udp': {
'icinga2',
},
},
},
},

6
nodes/home/nas.py
View file

@ -67,15 +67,15 @@ nodes['home.nas'] = {
},
'firewall': {
'port_rules': {
'4679': { # Dell ULNM
'4679/tcp': { # Dell ULNM
'172.19.136.0/25',
'172.19.138.0/24',
},
'5060': { # yate SIP
'5060/tcp': { # yate SIP
'home.snom-wohnzimmer',
'home.mitel-rfp35',
},
'5061': { # yate SIPS
'5061/tcp': { # yate SIPS
'home.snom-wohnzimmer',
'home.mitel-rfp35',
},

17
nodes/home/router.py
View file

@ -77,15 +77,16 @@ nodes['home.router'] = {
#'vars.notification.sms': True
},
'nftables': {
'rules': {
'forward': {
'50-router': [
# This is a router. Allow forwarding traffic for internal networks.
'inet filter forward ct state { related, established } accept',
# yaaaaay, IPv6! No NAT!
'inet filter forward ip6 nexthdr ipv6-icmp accept',
'inet filter forward tcp dport 22 accept',
'nat prerouting tcp dport 2022 dnat 172.19.138.20:22',
'ct state { related, established } accept',
'ip6 nexthdr ipv6-icmp accept',
'tcp dport 22 accept',
],
},
'prerouting': {
'50-router': [
'tcp dport 2022 dnat 172.19.138.20:22',
],
},
},

6
nodes/htz-cloud/miniserver.py
View file

@ -164,10 +164,10 @@ nodes['htz-cloud.miniserver'] = {
'2a01:4f8:0:1::add:9898',
},
'nftables': {
'rules': {
'input': {
'50-sophie-weechat': [
'inet filter input udp dport { 60000-61000 } accept',
'inet filter input tcp dport 9001 accept',
'udp dport { 60000-61000 } accept',
'tcp dport 9001 accept',
],
},
},

16
nodes/htz-cloud/wireguard.py
View file

@ -38,14 +38,18 @@ nodes['htz-cloud.wireguard'] = {
},
},
'nftables': {
'rules': {
'input': {
'50-router': [
'inet filter forward ct state { related, established } accept',
'inet filter forward oif eth0 accept',
'nat postrouting oif eth0 masquerade',
'ct state { related, established } accept',
'oifname eth0 accept',
],
'wg_special': [
'inet filter input udp dport 51819 accept',
'50-wireguard': [
'udp dport 51819 accept',
],
},
'postrouting': {
'50-router': [
'oifname eth0 masquerade',
],
},
},

6
nodes/htz-hel/backup-sophie.py
View file

@ -41,10 +41,10 @@ nodes['htz-hel.backup-sophie'] = {
'zfs-base': 'tank/backups',
},
'nftables': {
'rules': {
'input': {
'50-sophie-misc': [
'inet filter input udp dport { 60000-61000 } accept',
'inet filter input tcp dport 5201 accept',
'udp dport { 60000-61000 } accept',
'tcp dport 5201 accept',
],
},
},

3
nodes/kunsi-p14s.py
View file

@ -34,7 +34,7 @@ nodes['kunsi-p14s'] = {
# '192.168.0.0/16',
#},
# For the occasional file-share using `python -m http.server`
'8000': {'*'},
'8000/tcp': {'*'},
},
},
'interfaces': {
@ -68,7 +68,6 @@ nodes['kunsi-p14s'] = {
'openssh': {
'restrict-to': {
'rfc1918',
'ipv6',
},
},
'openvpn-client': {

5
nodes/kunsi-t470.py
View file

@ -36,13 +36,13 @@ nodes['kunsi-t470'] = {
'firewall': {
'port_rules': {
# obs websocket thingie - just allow all RFC1918 ips here
'4444': {
'4444/tcp': {
'10.0.0.0/8',
'172.16.0.0/12',
'192.168.0.0/16',
},
# For the occasional file-share using `python -m http.server`
'8000': {'*'},
'8000/tcp': {'*'},
},
},
'locale': {
@ -73,7 +73,6 @@ nodes['kunsi-t470'] = {
'10.0.0.0/8',
'172.16.0.0/12',
'192.168.0.0/16',
'ipv6',
},
},
'pacman': {