# our hosts define ap1 = 10.42.0.5 define ap2 = 10.42.0.6 define labitat = 185.38.172.72 define jumbotron_ip4 = 10.42.1.36 define jumbotron_ip6 = 2a01:4262:1ab:b:ba27:ebff:fed3:c162 # internal stuff define ext_if = wan define ext_ip4 = 185.38.175.0 define ext_ip6 = 2a01:4262:1ab:: define int_net4 = 10.42.0.0/16 define ext_net4 = 185.38.175.0/24 define ext_net6 = 2a01:4262:1ab::/48 define link_net4 = 193.106.167.40/29 define link_net6 = 2a03:5440:1:2935:1ab::/80 define adm_if = lan10 define adm_ip4 = 10.42.0.1 define adm_net4 = 10.42.0.0/24 define wire_if = lan11 define wire_ip4 = 10.42.1.1 define wire_net4 = 10.42.1.0/24 define wire_net6 = 2a01:4262:1ab:b::/64 define priv_if = lan12 define priv_ip4 = 10.42.2.1 define priv_net4 = 10.42.2.0/24 define priv_net6 = 2a01:4262:1ab:c::/64 define free_if = lan13 define free_ip4 = 10.42.3.1 define free_nat = 185.38.175.1 define free_net4 = 10.42.3.0/24 define free_net6 = 2a01:4262:1ab:d::/64 define pass_if = lan14 define pass_ip4 = 10.42.4.1 define pass_net4 = 10.42.4.0/24 define pass_net6 = 2a01:4262:1ab:e::/64 define futu_if = lan15 define futu_net6 = 2a01:4262:1ab:f::/64 define nat64_if = nat64 define nat64_net4 = 10.42.128.0/17 define colo_if = lan20 define avahi_ifs = { $wire_if, $priv_if, $pass_if } table ip filter { chain input { type filter hook input priority 0; ct state established,related accept ct state invalid drop # no ping floods ip protocol icmp limit rate 100/second accept ip protocol icmp drop iif lo accept # drop incoming spoofed packages iif $ext_if ip saddr { 10.0.0.0/8, $ext_net4 } drop # bird etc. on fiberby link iif $ext_if ip saddr $link_net4 ip daddr $link_net4 counter accept # dhcp udp sport bootpc udp dport bootps iif != $ext_if counter accept # radius iif $adm_if ip saddr { $ap1, $ap2 } udp dport 1812 accept # tftp iif $wire_if ip saddr $wire_net4 udp dport 69 accept # ssh tcp dport 22 accept # dns tcp dport 53 ip saddr { $int_net4, $ext_net4 } accept udp dport 53 ip saddr { $int_net4, $ext_net4 } accept # ntp udp dport 123 ip saddr { $int_net4, $ext_net4 } accept # avahi ip daddr 224.0.0.251 udp dport 5353 iif $avahi_ifs accept ip protocol igmp iif $avahi_ifs accept # http cert validation tcp dport 80 ip daddr $ext_ip4 accept ## debugging #iif $ext_if counter drop #udp dport { 137, 138, 5353, 27036 } drop # NetBIOS, Avahi, Steam in-home stream #udp sport 17500 udp dport 17500 drop # Dropbox LANsync #ip protocol igmp drop # IGMP #counter log prefix "in4: " drop drop } chain forward { type filter hook forward priority 0; ct state established,related accept ct state invalid drop # drop incoming spoofed packages iif $ext_if ip saddr { 10.0.0.0/8, $ext_net4 } drop # jumbotron webhook ip daddr $jumbotron_ip4 tcp dport 17380 counter accept # no traffic to admin net ip daddr $adm_net4 ip saddr $int_net4 reject with icmp type net-prohibited ip daddr $adm_net4 drop # local traffic iif $adm_if ip saddr $adm_net4 accept iif $wire_if ip saddr $wire_net4 accept iif $priv_if ip saddr $priv_net4 accept iif $free_if ip saddr $free_net4 ip daddr != $int_net4 accept iif $pass_if ip saddr $pass_net4 accept iif $nat64_if ip saddr $nat64_net4 accept iif $colo_if ip daddr != $int_net4 accept oif $colo_if accept ## debugging #iif $ext_if counter drop #counter log prefix "fw4: " drop drop } chain prerouting { type filter hook prerouting priority 0; # colo reverse path filtering # find route to saddr on iif, get oif, drop if route is missing iif $colo_if fib saddr . iif oif missing drop; } } table ip6 filter { chain input { type filter hook input priority 0; ct state established,related accept ct state invalid drop # no ping floods ip6 nexthdr ipv6-icmp limit rate 100/second accept ip6 nexthdr ipv6-icmp drop iif lo accept # drop incoming spoofed packages iif $ext_if ip6 saddr $ext_net6 drop iif { $adm_if, $wire_if, $priv_if, $free_if, $pass_if } hbh nexthdr ipv6-icmp accept # bird etc. on fiberby link iif $ext_if ip6 saddr $link_net6 ip6 daddr $link_net6 counter accept # tftp iif $wire_if ip6 saddr $wire_net6 udp dport 69 accept # ssh tcp dport 22 accept # dns tcp dport 53 ip6 saddr $ext_net6 accept udp dport 53 ip6 saddr $ext_net6 accept # ntp udp dport 123 ip6 saddr $ext_net6 accept # avahi ip6 daddr ff02::fb udp dport 5353 iif $avahi_ifs accept # http cert validation tcp dport 80 ip6 daddr $ext_ip6 accept ## debugging #counter log prefix "in6: " drop drop } chain forward { type filter hook forward priority 0; ct state established,related accept ct state invalid drop # drop incoming spoofed packages iif $ext_if ip6 saddr $ext_net6 drop # jumbotron webhook ip6 daddr $jumbotron_ip6 tcp dport 17380 counter accept iif $wire_if ip6 saddr $wire_net6 accept iif $priv_if ip6 saddr $priv_net6 accept iif $free_if ip6 saddr $free_net6 ip6 daddr != $ext_net6 accept iif $pass_if ip6 saddr $pass_net6 accept iif $futu_if ip6 saddr $futu_net6 accept iif $colo_if ip6 daddr != $ext_net6 accept oif $colo_if accept ## debugging #counter log prefix "fw6: " drop drop } chain prerouting { type filter hook prerouting priority 0; # colo reverse path filtering # find route to saddr on iif, get oif, drop if route is missing iif $colo_if fib saddr . iif oif missing drop; } } table ip nat { chain portforward { ip daddr $ext_ip4 tcp dport 17380 dnat $jumbotron_ip4 # jumbotron webhook } chain prerouting { type nat hook prerouting priority -150; goto portforward } chain output { type nat hook output priority -150; goto portforward } chain input { type nat hook input priority -150; # this chain is needed to make dnat from the output chain work } chain postrouting { type nat hook postrouting priority -150; oif $ext_if ip saddr $free_net4 snat $free_nat oif $ext_if ip saddr $int_net4 snat $ext_ip4 } } table ip6 nat { chain portforward { ip6 daddr $ext_ip6 tcp dport 17380 dnat $jumbotron_ip6 # jumbotron webhook } chain prerouting { type nat hook prerouting priority -150; goto portforward } chain output { type nat hook output priority -150; goto portforward } #chain input { # type nat hook input priority -150; # # this chain is needed to make dnat from the output chain work #} #chain postrouting { # type nat hook postrouting priority -150; #} }