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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
}
chain input {
type filter hook input priority filter
policy accept
limit name lim_arp counter drop
counter
}
chain output {
type filter hook output priority filter
policy accept
limit name lim_arp counter drop
counter
}
}
table inet filter {
limit lim_reject {
rate over 1000/second burst 1000 packets
}
limit lim_icmp {
rate over 50 mbytes/second burst 50 mbytes
}
chain forward {
type filter hook forward priority filter
policy drop
ct state invalid log level debug prefix "drop invalid forward: " counter drop
iifname lo counter accept
meta l4proto $icmp_protos iifname {yggdrasil, bifrost} oifname {bifrost, ens3} limit name lim_icmp counter drop
meta l4proto $icmp_protos iifname {yggdrasil, bifrost} oifname {bifrost, ens3} counter accept
meta l4proto $icmp_protos ct state {established, related} limit name lim_icmp counter drop
meta l4proto $icmp_protos ct state {established, related} counter accept
meta l4proto $icmp_protos oifname bifrost limit name lim_icmp counter drop
meta l4proto $icmp_protos oifname bifrost counter accept
oifname bifrost counter accept
iifname bifrost oifname ens3 counter accept
limit name lim_reject log level debug prefix "drop forward: " counter drop
log level debug prefix "reject forward: " counter
meta l4proto tcp ct state new counter reject with tcp reset
ct state new counter reject
counter
}
chain input {
type filter hook input priority filter
policy drop
ct state invalid log level debug prefix "drop invalid input: " counter drop
iifname lo counter accept
iif != lo ip daddr 127.0.0.1/8 counter reject
iif != lo ip6 daddr ::1/128 counter reject
meta l4proto $icmp_protos limit name lim_icmp counter drop
meta l4proto $icmp_protos counter accept
tcp dport 22 counter accept
udp dport 60001-61000 counter accept
meta protocol ip udp dport 51820 counter accept
meta protocol ip6 udp dport {51821, 51822} counter accept
iifname "yggdrasil-wg-*" meta l4proto gre counter accept
tcp dport 53 counter accept
udp dport 53 counter accept
tcp dport {80, 443} counter accept
ct state {established, related} counter accept
limit name lim_reject log level debug prefix "drop input: " counter drop
log level debug prefix "reject input: " counter
meta l4proto tcp ct state new counter reject with tcp reset
ct state new counter reject
counter
}
chain output {
type filter hook output priority filter
policy accept
oifname lo counter accept
meta l4proto $icmp_protos limit name lim_icmp counter drop
meta l4proto $icmp_protos counter accept
counter
}
}
|
