# 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
}
}
