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define icmp_protos = {ipv6-icmp, icmp, igmp}
table arp filter {
limit lim_arp {
rate over 50 mbytes/second burst 50 mbytes
}
counter arp-rx {}
counter arp-tx {}
counter arp-ratelimit-rx {}
counter arp-ratelimit-tx {}
chain input {
type filter hook input priority filter
policy accept
limit name lim_arp counter name arp-ratelimit-rx drop
counter name arp-rx
}
chain output {
type filter hook output priority filter
policy accept
limit name lim_arp counter name arp-ratelimit-tx drop
counter name arp-tx
}
}
table inet filter {
limit lim_reject {
rate over 1000/second burst 1000 packets
}
limit lim_icmp {
rate over 50 mbytes/second burst 50 mbytes
}
counter invalid-fw {}
counter fw-lo {}
counter fw-bifrost {}
counter fw-inet {}
counter icmp-ratelimit-vpn-fw {}
counter icmp-ratelimit-established-fw {}
counter icmp-ratelimit-inet-fw {}
counter icmp-vpn-fw {}
counter icmp-established-fw {}
counter icmp-inet-fw {}
counter reject-ratelimit-fw {}
counter reject-fw {}
counter reject-tcp-fw {}
counter reject-icmp-fw {}
counter drop-fw {}
counter invalid-rx {}
counter rx-lo {}
counter invalid-local4-rx {}
counter invalid-local6-rx {}
counter icmp-ratelimit-rx {}
counter icmp-rx {}
counter ssh-rx {}
counter mosh-rx {}
counter wg-rx {}
counter yggdrasil-gre-rx {}
counter dns-rx {}
counter http-rx {}
counter stun-rx {}
counter turn-rx {}
counter established-rx {}
counter reject-ratelimit-rx {}
counter reject-rx {}
counter reject-tcp-rx {}
counter reject-icmp-rx {}
counter drop-rx {}
counter tx-lo {}
counter icmp-ratelimit-tx {}
counter icmp-tx {}
counter ssh-tx {}
counter mosh-tx {}
counter dns-tx {}
counter wg-tx {}
counter yggdrasil-gre-tx {}
counter http-tx {}
counter stun-tx {}
counter turn-tx {}
counter tx {}
chain forward {
type filter hook forward priority filter
policy drop
ct state invalid log level debug prefix "drop invalid forward: " counter name invalid-fw drop
iifname lo counter name fw-lo accept
meta l4proto $icmp_protos iifname {yggdrasil, bifrost} oifname {bifrost, ens3} limit name lim_icmp counter name icmp-ratelimit-vpn-fw drop
meta l4proto $icmp_protos iifname {yggdrasil, bifrost} oifname {bifrost, ens3} counter name icmp-vpn-fw accept
meta l4proto $icmp_protos ct state {established, related} limit name lim_icmp counter name icmp-ratelimit-established-fw drop
meta l4proto $icmp_protos ct state {established, related} counter name icmp-established-fw accept
meta l4proto $icmp_protos oifname bifrost limit name lim_icmp counter name icmp-ratelimit-inet-fw drop
meta l4proto $icmp_protos oifname bifrost counter name icmp-inet-fw accept
oifname bifrost counter name fw-bifrost accept
iifname bifrost oifname ens3 counter name fw-inet accept
limit name lim_reject log level debug prefix "drop forward: " counter name reject-ratelimit-fw drop
log level debug prefix "reject forward: " counter name reject-fw
meta l4proto tcp ct state new counter name reject-tcp-fw reject with tcp reset
ct state new counter name reject-icmp-fw reject
counter name drop-fw
}
chain input {
type filter hook input priority filter
policy drop
ct state invalid log level debug prefix "drop invalid input: " counter name invalid-rx drop
iifname lo counter name rx-lo accept
iif != lo ip daddr 127.0.0.1/8 counter name invalid-local4-rx reject
iif != lo ip6 daddr ::1/128 counter name invalid-local6-rx reject
meta l4proto $icmp_protos limit name lim_icmp counter name icmp-ratelimit-rx drop
meta l4proto $icmp_protos counter name icmp-rx accept
tcp dport 22 counter name ssh-rx accept
udp dport 60001-61000 counter name mosh-rx accept
meta protocol ip udp dport 51820 counter name wg-rx accept
meta protocol ip6 udp dport {51821, 51822} counter name wg-rx accept
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-rx accept
tcp dport 53 counter name dns-rx accept
udp dport 53 counter name dns-rx accept
tcp dport {80, 443, 8448} counter name http-rx accept
tcp dport {3478, 5349} counter name stun-rx accept
udp dport {3478, 5349} counter name stun-rx accept
udp dport 49000-50000 counter name turn-rx accept
ct state {established, related} counter name established-rx accept
limit name lim_reject log level debug prefix "drop input: " counter name reject-ratelimit-rx drop
log level debug prefix "reject input: " counter name reject-rx
meta l4proto tcp ct state new counter name reject-tcp-rx reject with tcp reset
ct state new counter name reject-icmp-rx reject
counter name drop-rx
}
chain output {
type filter hook output priority filter
policy accept
oifname lo counter name tx-lo accept
meta l4proto $icmp_protos limit name lim_icmp counter name icmp-ratelimit-tx drop
meta l4proto $icmp_protos counter name icmp-tx accept
tcp sport 22 counter name ssh-tx
udp sport 60001-61000 counter name mosh-tx
tcp sport 53 counter name dns-tx
udp sport 53 counter name dns-tx
meta protocol ip udp sport 51820 counter name wg-tx
meta protocol ip6 udp sport {51821, 51822} counter name wg-tx
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-tx
tcp sport {80,443,8448} counter name http-tx accept
tcp sport {3478, 5349} counter name stun-tx accept
udp sport {3478, 5349} counter name stun-tx accept
udp sport 49000-50000 counter name turn-tx accept
counter name tx
}
}
|
