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Diffstat (limited to 'data/templates/firewall/nftables.j2')
| -rw-r--r-- | data/templates/firewall/nftables.j2 | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/data/templates/firewall/nftables.j2 b/data/templates/firewall/nftables.j2 new file mode 100644 index 000000000..fac3fad03 --- /dev/null +++ b/data/templates/firewall/nftables.j2 @@ -0,0 +1,274 @@ +#!/usr/sbin/nft -f + +{% if cleanup_commands is vyos_defined %} +{% for command in cleanup_commands %} +{{ command }} +{% endfor %} +{% endif %} + +include "/run/nftables_defines.conf" + +table ip filter { +{% if first_install is vyos_defined %} + chain VYOS_FW_FORWARD { + type filter hook forward priority 0; policy accept; + jump VYOS_POST_FW + } + chain VYOS_FW_LOCAL { + type filter hook input priority 0; policy accept; + jump VYOS_POST_FW + } + chain VYOS_FW_OUTPUT { + type filter hook output priority 0; policy accept; + jump VYOS_POST_FW + } + chain VYOS_POST_FW { + return + } + chain VYOS_FRAG_MARK { + type filter hook prerouting priority -450; policy accept; + ip frag-off & 0x3fff != 0 meta mark set 0xffff1 return + } +{% endif %} +{% if name is vyos_defined %} +{% set ns = namespace(sets=[]) %} +{% for name_text, conf in name.items() %} + chain NAME_{{ name_text }} { +{% if conf.rule is vyos_defined %} +{% for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %} + {{ rule_conf | nft_rule(name_text, rule_id) }} +{% if rule_conf.recent is vyos_defined %} +{% set ns.sets = ns.sets + [name_text + '_' + rule_id] %} +{% endif %} +{% endfor %} +{% endif %} + {{ conf | nft_default_rule(name_text) }} + } +{% endfor %} +{% for set_name in ns.sets %} + set RECENT_{{ set_name }} { + type ipv4_addr + size 65535 + flags dynamic + } +{% endfor %} +{% endif %} +{% if state_policy is vyos_defined %} + chain VYOS_STATE_POLICY { +{% if state_policy.established is vyos_defined %} + {{ state_policy.established | nft_state_policy('established') }} +{% endif %} +{% if state_policy.invalid is vyos_defined %} + {{ state_policy.invalid | nft_state_policy('invalid') }} +{% endif %} +{% if state_policy.related is vyos_defined %} + {{ state_policy.related | nft_state_policy('related') }} +{% endif %} + return + } +{% endif %} +} + +table ip6 filter { +{% if first_install is vyos_defined %} + chain VYOS_FW6_FORWARD { + type filter hook forward priority 0; policy accept; + jump VYOS_POST_FW6 + } + chain VYOS_FW6_LOCAL { + type filter hook input priority 0; policy accept; + jump VYOS_POST_FW6 + } + chain VYOS_FW6_OUTPUT { + type filter hook output priority 0; policy accept; + jump VYOS_POST_FW6 + } + chain VYOS_POST_FW6 { + return + } + chain VYOS_FRAG6_MARK { + type filter hook prerouting priority -450; policy accept; + exthdr frag exists meta mark set 0xffff1 return + } +{% endif %} +{% if ipv6_name is vyos_defined %} +{% set ns = namespace(sets=[]) %} +{% for name_text, conf in ipv6_name.items() %} + chain NAME6_{{ name_text }} { +{% if conf.rule is vyos_defined %} +{% for rule_id, rule_conf in conf.rule.items() if rule_conf.disable is not vyos_defined %} + {{ rule_conf | nft_rule(name_text, rule_id, 'ip6') }} +{% if rule_conf.recent is vyos_defined %} +{% set ns.sets = ns.sets + [name_text + '_' + rule_id] %} +{% endif %} +{% endfor %} +{% endif %} + {{ conf | nft_default_rule(name_text) }} + } +{% endfor %} +{% for set_name in ns.sets %} + set RECENT6_{{ set_name }} { + type ipv6_addr + size 65535 + flags dynamic + } +{% endfor %} +{% endif %} +{% if state_policy is vyos_defined %} + chain VYOS_STATE_POLICY6 { +{% if state_policy.established is vyos_defined %} + {{ state_policy.established | nft_state_policy('established', ipv6=True) }} +{% endif %} +{% if state_policy.invalid is vyos_defined %} + {{ state_policy.invalid | nft_state_policy('invalid', ipv6=True) }} +{% endif %} +{% if state_policy.related is vyos_defined %} + {{ state_policy.related | nft_state_policy('related', ipv6=True) }} +{% endif %} + return + } +{% endif %} +} + +{% if first_install is vyos_defined %} +table ip nat { + chain PREROUTING { + type nat hook prerouting priority -100; policy accept; + counter jump VYOS_PRE_DNAT_HOOK + } + + chain POSTROUTING { + type nat hook postrouting priority 100; policy accept; + counter jump VYOS_PRE_SNAT_HOOK + } + + chain VYOS_PRE_DNAT_HOOK { + return + } + + chain VYOS_PRE_SNAT_HOOK { + return + } +} + +table ip6 nat { + chain PREROUTING { + type nat hook prerouting priority -100; policy accept; + counter jump VYOS_DNPT_HOOK + } + + chain POSTROUTING { + type nat hook postrouting priority 100; policy accept; + counter jump VYOS_SNPT_HOOK + } + + chain VYOS_DNPT_HOOK { + return + } + + chain VYOS_SNPT_HOOK { + return + } +} + +table inet mangle { + chain FORWARD { + type filter hook forward priority -150; policy accept; + } +} + +table raw { + chain VYOS_TCP_MSS { + type filter hook forward priority -300; policy accept; + } + + chain PREROUTING { + type filter hook prerouting priority -200; policy accept; + counter jump VYOS_CT_IGNORE + counter jump VYOS_CT_TIMEOUT + counter jump VYOS_CT_PREROUTING_HOOK + counter jump FW_CONNTRACK + notrack + } + + chain OUTPUT { + type filter hook output priority -200; policy accept; + counter jump VYOS_CT_IGNORE + counter jump VYOS_CT_TIMEOUT + counter jump VYOS_CT_OUTPUT_HOOK + counter jump FW_CONNTRACK + notrack + } + + ct helper rpc_tcp { + type "rpc" protocol tcp; + } + + ct helper rpc_udp { + type "rpc" protocol udp; + } + + ct helper tns_tcp { + type "tns" protocol tcp; + } + + chain VYOS_CT_HELPER { + ct helper set "rpc_tcp" tcp dport {111} return + ct helper set "rpc_udp" udp dport {111} return + ct helper set "tns_tcp" tcp dport {1521,1525,1536} return + return + } + + chain VYOS_CT_IGNORE { + return + } + + chain VYOS_CT_TIMEOUT { + return + } + + chain VYOS_CT_PREROUTING_HOOK { + return + } + + chain VYOS_CT_OUTPUT_HOOK { + return + } + + chain FW_CONNTRACK { + accept + } +} + +table ip6 raw { + chain VYOS_TCP_MSS { + type filter hook forward priority -300; policy accept; + } + + chain PREROUTING { + type filter hook prerouting priority -300; policy accept; + counter jump VYOS_CT_PREROUTING_HOOK + counter jump FW_CONNTRACK + notrack + } + + chain OUTPUT { + type filter hook output priority -300; policy accept; + counter jump VYOS_CT_OUTPUT_HOOK + counter jump FW_CONNTRACK + notrack + } + + chain VYOS_CT_PREROUTING_HOOK { + return + } + + chain VYOS_CT_OUTPUT_HOOK { + return + } + + chain FW_CONNTRACK { + accept + } +} +{% endif %} |