define icmp_protos = { ipv6-icmp, icmp, igmp } table arp filter { limit lim_arp_local { rate over 50 mbytes/second burst 50 mbytes } limit lim_arp_dsl { rate over 1400 kbytes/second burst 1400 kbytes } counter arp-rx {} counter arp-tx {} counter arp-ratelimit-dsl-rx {} counter arp-ratelimit-dsl-tx {} counter arp-ratelimit-local-rx {} counter arp-ratelimit-local-tx {} chain input { type filter hook input priority filter policy accept iifname != dsl limit name lim_arp_local counter name arp-ratelimit-local-rx drop iifname dsl limit name lim_arp_dsl counter name arp-ratelimit-dsl-rx drop counter name arp-rx } chain output { type filter hook output priority filter policy accept oifname != dsl limit name lim_arp_local counter name arp-ratelimit-local-tx drop oifname dsl limit name lim_arp_dsl counter name arp-ratelimit-dsl-tx drop counter name arp-tx } } table inet filter { limit lim_reject { rate over 1000/second burst 1000 packets } limit lim_icmp_local { rate over 50 mbytes/second burst 50 mbytes } limit lim_icmp_dsl { rate over 1400 kbytes/second burst 1400 kbytes } counter icmp-ratelimit-dsl-fw {} counter icmp-ratelimit-local-fw {} counter icmp-fw {} counter invalid-fw {} counter fw-lo {} counter fw-lan {} counter fw-dsl {} counter fw-cups {} 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-dsl-rx {} counter icmp-ratelimit-local-rx {} counter icmp-rx {} counter ssh-rx {} counter mosh-rx {} counter dns-rx {} counter nfs-rx {} counter wg-rx {} counter yggdrasil-gre-rx {} counter ipv6-pd-rx {} counter ntp-rx {} counter dhcp-rx {} counter samba-rx {} counter http-rx {} counter tftp-rx {} counter pgbackrest-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-dsl-tx {} counter icmp-ratelimit-local-tx {} counter icmp-tx {} counter ssh-tx {} counter mosh-tx {} counter dns-tx {} counter nfs-tx {} counter wg-tx {} counter yggdrasil-gre-tx {} counter ipv6-pd-tx {} counter ntp-tx {} counter dhcp-tx {} counter samba-tx {} counter http-tx {} counter tftp-tx {} counter pgbackrest-tx {} counter tx {} chain forward_icmp_accept { oifname { dsl, bifrost } limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-fw drop iifname { dsl, bifrost } limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-fw drop oifname != { dsl, bifrost } limit name lim_icmp_local counter name icmp-ratelimit-local-fw drop iifname != { dsl, bifrost } limit name lim_icmp_local counter name icmp-ratelimit-local-fw drop counter name icmp-fw accept } 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 oifname { lan, dsl, bifrost } meta l4proto $icmp_protos jump forward_icmp_accept iifname lan oifname { dsl, bifrost } counter name fw-lan accept iifname dsl oifname lan ct state { established, related } counter name fw-dsl 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 iifname { bifrost, dsl } meta l4proto $icmp_protos limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-rx drop iifname != { bifrost, dsl } meta l4proto $icmp_protos limit name lim_icmp_local counter name icmp-ratelimit-local-rx drop meta l4proto $icmp_protos counter name icmp-rx accept iifname { lan, mgmt, dsl, yggdrasil, bifrost } tcp dport 22 counter name ssh-rx accept iifname { lan, mgmt, dsl, yggdrasil, bifrost } udp dport 60000-61000 counter name mosh-rx accept iifname { lan, mgmt, wifibh, yggdrasil } meta l4proto { tcp, udp } th dport 53 counter name dns-rx accept iifname { lan, yggdrasil } tcp dport 2049 counter name nfs-rx accept iifname { lan, mgmt, dsl } meta protocol ip udp dport 51820 counter name wg-rx accept iifname { lan, mgmt, dsl } meta protocol ip6 udp dport 51821 counter name wg-rx accept iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-rx accept iifname dsl meta protocol ip6 udp dport 546 udp sport 547 counter name ipv6-pd-rx accept iifname mgmt udp dport 123 counter name ntp-rx accept iifname { lan, mgmt, wifibh } udp dport 67 counter name dhcp-rx accept iifname lan meta l4proto . th dport { udp . 137, udp . 138, tcp . 139, tcp . 445, udp . 3702, tcp . 5357 } counter name samba-rx accept iifname yggdrasil tcp dport { 80, 443 } counter name http-rx accept iifname lan tcp dport 80 counter name http-rx accept iifname { lan, mgmt } udp dport 69 counter name tftp-rx accept tcp dport 8432 counter name pgbackrest-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 } chain output { type filter hook output priority filter policy accept oifname lo counter name tx-lo accept oifname { bifrost, dsl } meta l4proto $icmp_protos limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-tx drop oifname != { bifrost, dsl } meta l4proto $icmp_protos limit name lim_icmp_local counter name icmp-ratelimit-local-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 meta l4proto { tcp, udp } th sport 53 counter name dns-tx tcp sport 2049 counter name nfs-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 meta protocol ip6 udp sport 546 udp dport 547 counter name ipv6-pd-tx udp sport 123 counter name ntp-tx accept udp sport 67 counter name dhcp-tx accept meta l4proto . th sport { udp . 137, udp . 138, tcp . 139, tcp . 445, udp . 3702, tcp . 5357 } counter name samba-tx accept tcp sport { 80, 443 } counter name http-tx accept udp sport 69 counter name tftp-tx accept udp dport 69 counter name tftp-tx accept tcp sport 8432 counter name pgbackrest-tx accept counter name tx } } table inet nat { counter dsl-nat {} # counter container-nat {} chain postrouting { type nat hook postrouting priority srcnat policy accept meta nfproto ipv4 oifname dsl counter name dsl-nat masquerade # iifname ve-* oifname dsl counter name container-nat masquerade } } table ip mss_clamp { counter dsl-mss-clamp {} chain postrouting { type filter hook postrouting priority mangle policy accept oifname dsl tcp flags & (syn|rst) == syn counter name dsl-mss-clamp tcp option maxseg size set rt mtu } } ## Masks for extracting/storing data in the conntrack mark # define ct_dscp = 0x0000003f # define ct_dyn = 0x00000080 # define ct_dyn_static_dscp = 0x000000ff define ct_static = 0x00000040 define ct_unused = 0xffffff80 # define ct_unused_dscp = 0xffffff3f # define ct_unused_dyn = 0xffffff80 ## DSCP classification values define cs0 = 0 define lephb = 1 define cs1 = 8 define af11 = 10 define af12 = 12 define af13 = 14 define cs2 = 16 define af21 = 18 define af22 = 20 define af23 = 22 define cs3 = 24 define af31 = 26 define af32 = 28 define af33 = 30 define cs4 = 32 define af41 = 34 define af42 = 36 define af43 = 38 define cs5 = 40 define va = 44 define ef = 46 define cs6 = 48 define cs7 = 56 table inet dscpclassify { ## Set conntrack DSCP mark without modifying unused bits chain ct_set_cs0 { ct mark set ct mark and $ct_unused or $cs0 } chain ct_set_lephb { ct mark set ct mark and $ct_unused or $lephb or $ct_static } chain ct_set_cs1 { ct mark set ct mark and $ct_unused or $cs1 or $ct_static } chain ct_set_af11 { ct mark set ct mark and $ct_unused or $af11 or $ct_static } chain ct_set_af12 { ct mark set ct mark and $ct_unused or $af12 or $ct_static } chain ct_set_af13 { ct mark set ct mark and $ct_unused or $af13 or $ct_static } chain ct_set_cs2 { ct mark set ct mark and $ct_unused or $cs2 or $ct_static } chain ct_set_af21 { ct mark set ct mark and $ct_unused or $af21 or $ct_static } chain ct_set_af22 { ct mark set ct mark and $ct_unused or $af22 or $ct_static } chain ct_set_af23 { ct mark set ct mark and $ct_unused or $af23 or $ct_static } chain ct_set_cs3 { ct mark set ct mark and $ct_unused or $cs3 or $ct_static } chain ct_set_af31 { ct mark set ct mark and $ct_unused or $af31 or $ct_static } chain ct_set_af32 { ct mark set ct mark and $ct_unused or $af32 or $ct_static } chain ct_set_af33 { ct mark set ct mark and $ct_unused or $af33 or $ct_static } chain ct_set_cs4 { ct mark set ct mark and $ct_unused or $cs4 or $ct_static } chain ct_set_af41 { ct mark set ct mark and $ct_unused or $af41 or $ct_static } chain ct_set_af42 { ct mark set ct mark and $ct_unused or $af42 or $ct_static } chain ct_set_af43 { ct mark set ct mark and $ct_unused or $af43 or $ct_static } chain ct_set_cs5 { ct mark set ct mark and $ct_unused or $cs5 or $ct_static } chain ct_set_va { ct mark set ct mark and $ct_unused or $va or $ct_static } chain ct_set_ef { ct mark set ct mark and $ct_unused or $ef or $ct_static } chain ct_set_cs6 { ct mark set ct mark and $ct_unused or $cs6 or $ct_static } chain ct_set_cs7 { ct mark set ct mark and $ct_unused or $cs7 or $ct_static } chain postrouting { type filter hook postrouting priority filter + 1; policy accept oifname != dsl return ip dscp cs0 goto ct_set_cs0 ip dscp lephb goto ct_set_lephb ip dscp cs1 goto ct_set_cs1 ip dscp af11 goto ct_set_af11 ip dscp af12 goto ct_set_af12 ip dscp af13 goto ct_set_af13 ip dscp cs2 goto ct_set_cs2 ip dscp af21 goto ct_set_af21 ip dscp af22 goto ct_set_af22 ip dscp af23 goto ct_set_af23 ip dscp cs3 goto ct_set_cs3 ip dscp af31 goto ct_set_af31 ip dscp af32 goto ct_set_af32 ip dscp af33 goto ct_set_af33 ip dscp cs4 goto ct_set_cs4 ip dscp af41 goto ct_set_af41 ip dscp af42 goto ct_set_af42 ip dscp af43 goto ct_set_af43 ip dscp cs5 goto ct_set_cs5 ip dscp va goto ct_set_va ip dscp ef goto ct_set_ef ip dscp cs6 goto ct_set_cs6 ip dscp cs7 goto ct_set_cs7 ip6 dscp cs0 goto ct_set_cs0 ip6 dscp lephb goto ct_set_lephb ip6 dscp cs1 goto ct_set_cs1 ip6 dscp af11 goto ct_set_af11 ip6 dscp af12 goto ct_set_af12 ip6 dscp af13 goto ct_set_af13 ip6 dscp cs2 goto ct_set_cs2 ip6 dscp af21 goto ct_set_af21 ip6 dscp af22 goto ct_set_af22 ip6 dscp af23 goto ct_set_af23 ip6 dscp cs3 goto ct_set_cs3 ip6 dscp af31 goto ct_set_af31 ip6 dscp af32 goto ct_set_af32 ip6 dscp af33 goto ct_set_af33 ip6 dscp cs4 goto ct_set_cs4 ip6 dscp af41 goto ct_set_af41 ip6 dscp af42 goto ct_set_af42 ip6 dscp af43 goto ct_set_af43 ip6 dscp cs5 goto ct_set_cs5 ip6 dscp va goto ct_set_va ip6 dscp ef goto ct_set_ef ip6 dscp cs6 goto ct_set_cs6 ip6 dscp cs7 goto ct_set_cs7 } }