# our hosts define ap1 = 10.42.0.5 define ap2 = 10.42.0.6 define labitat = 185.38.172.72 define spacewand4 = 185.38.175.70 define spacewand6 = 2a01:4262:1ab::cafe define spacebrain4 = 185.38.175.69 define spacebrain6 = 2a01:4262:1ab::db define labservers4 = { $spacewand4, $spacebrain4 } define labservers6 = { $spacewand6, $spacebrain6 } # 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::/120 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_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 serv_if = lan20 define serv_ip4 = 185.38.175.65 define serv_net4 = 185.38.175.64/24 define serv_net6 = 2a01:4262:1ab:20::/64 define avahi_ifs = { $wire_if, $priv_if, $pass_if } #define nat64_if = nat64 #define nat64_net = 10.42.255.0/24 #define nat64_net6 = fde2:52b4:4a19:ffff::/96 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 # 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 # avahi ip daddr 224.0.0.251 udp dport 5353 iif $avahi_ifs accept ip protocol igmp iif $avahi_ifs 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 # accept all traffic to Labitat servers ip daddr $labservers4 accept ip saddr $labitat udp dport 161 counter accept # traffic stats # 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 $serv_if ip saddr $serv_net4 accept ## debugging #iif $ext_if counter drop #counter log prefix "fw4: " drop 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 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 # ssh tcp dport 22 accept # dns tcp dport 53 ip6 saddr $ext_net6 accept udp dport 53 ip6 saddr $ext_net6 accept # avahi ip6 daddr ff02::fb udp dport 5353 iif $avahi_ifs 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 # accept all traffic to Labitat servers ip6 daddr $labservers6 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 $serv_if ip6 saddr $serv_net6 accept ## debugging #counter log prefix "fw6: " drop drop } } table ip nat { chain portforward { ip daddr $ext_ip4 udp dport 161 dnat 10.42.0.9 # traffic stats } 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 $int_net4 snat $ext_ip4 } }