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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 reject-ratelimit-fw {}
counter reject-fw {}
counter reject-tcp-fw {}
counter reject-icmp-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 quickserve-rx {}
counter ausweisapp2-rx {}
counter established-rx {}
counter reject-ratelimit-rx {}
counter reject-rx {}
counter reject-tcp-rx {}
counter reject-icmp-rx {}
counter tx-lo {}
counter icmp-ratelimit-tx {}
counter icmp-tx {}
counter ssh-tx {}
counter mosh-tx {}
counter wg-tx {}
counter yggdrasil-gre-tx {}
counter quickserve-tx {}
counter tx {}
counter fw-libvirt {}
counter libvirt-dhcp {}
counter libvirt-dns {}
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
iifname virbr0 oifname != {lo, wgrz, yggdrasil-wg-4, yggdrasil-wg-6, yggdrasil, ip6tnl, ip6gre, yggre-surtr-6, yggre-surtr-4, yggre-vidhar-4} counter name fw-libvirt accept
oifname virbr0 ct state {established, related} counter name fw-libvirt 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
}
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 60000-61000 counter name mosh-rx accept
tcp dport 8000 counter name quickserve-rx accept
udp dport 24727 counter name ausweisapp2-rx accept
udp dport 51820-51822 counter name wg-rx accept
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-rx accept
iifname virbr0 udp dport 67 counter name libvirt-dhcp accept
iifname virbr0 udp dport 547 counter name libvirt-dhcp accept
iifname virbr0 udp dport 53 counter name libvirt-dns accept
iifname virbr0 tcp dport 53 counter name libvirt-dns 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
}
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 60000-61000 counter name mosh-tx
udp sport 51820-51822 counter name wg-tx
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-tx
tcp sport 8000 counter name quickserve-tx accept
oifname virbr0 udp sport 67 counter name libvirt-dhcp accept
oifname virbr0 udp sport 547 counter name libvirt-dhcp accept
oifname virbr0 udp sport 53 counter name libvirt-dns accept
oifname virbr0 tcp sport 53 counter name libvirt-dns accept
counter name tx
}
}
table ip nat {
counter libvirt-nat {}
chain postrouting {
type nat hook postrouting priority srcnat
policy accept
iifname virbr0 oifname != virbr0 counter name libvirt-nat masquerade
}
}
table ip6 nat {
counter libvirt-nat {}
chain postrouting {
type nat hook postrouting priority srcnat
policy accept
iifname virbr0 oifname != virbr0 counter name libvirt-nat masquerade
}
}
table ip mss_clamp {
counter libvirt-mss-clamp {}
chain postrouting {
type filter hook postrouting priority mangle
policy accept
iifname virbr0 oifname != virbr0 tcp flags & (syn|rst) == syn counter name libvirt-mss-clamp tcp option maxseg size set rt mtu
}
}
|
