diff options
Diffstat (limited to 'roles/space_server/templates/nftables.conf.j2')
| -rw-r--r-- | roles/space_server/templates/nftables.conf.j2 | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/roles/space_server/templates/nftables.conf.j2 b/roles/space_server/templates/nftables.conf.j2 new file mode 100644 index 0000000..412270c --- /dev/null +++ b/roles/space_server/templates/nftables.conf.j2 @@ -0,0 +1,332 @@ +# our hosts +define ap1 = {{ local_hosts['ap1'].ipv4[0] }} +define ap2 = {{ local_hosts['ap2'].ipv4[0] }} +define labitat = 185.38.172.72 +define jumbotron_ip4 = {{ local_hosts['jumbotron'].ipv4[0] }} +define jumbotron_ip6 = {{ local_hosts['jumbotron'].ipv6[0] }} + +# 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 tor_if = lan21 +define tor_net4 = 185.38.175.128/28 +define tor_net6 = 2a01:4262:1ab:ffff::/64 + +define local_ip4 = { $ext_ip4, $adm_ip4, $wire_ip4, $priv_ip4, $free_ip4, $pass_ip4 } +define local_ip6 = { $ext_ip6 } +define local_net4 = { $ext_ip4, $free_nat, $int_net4 } +define local_net6 = 2a01:4262:1ab::/52 + +define avahi_ifs = { $wire_if, $priv_if, $pass_if } + +table ip filter { + 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; + } + + 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 + + # bgp + iif $colo_if tcp dport bgp 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; + + # handle tor traffic - before ct + iif $tor_if ip saddr $tor_net4 ip daddr != $local_net4 accept + oif $tor_if ip daddr $tor_net4 ip saddr != $local_net4 accept + + 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 + } +} + +table ip6 filter { + 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; + } + + 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 + + # bgp + iif $colo_if tcp dport bgp 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; + + # handle tor traffic - before ct + iif $tor_if ip6 saddr $tor_net6 ip6 daddr != $local_net6 accept + oif $tor_if ip6 daddr $tor_net6 ip6 saddr != $local_net6 accept + + 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 + } +} + +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; + #} +} + +table ip raw { + chain prerouting { + type filter hook prerouting priority -300; policy accept + + iif lo accept + + # always do connection tracking for local IP's + ip saddr $local_ip4 accept + ip daddr $local_ip4 accept + + # avoid connection tracking for most Tor traffic + ip saddr $tor_net4 ip daddr != $local_net4 notrack + ip daddr $tor_net4 ip saddr != $local_net4 notrack + } +} + +table ip6 raw { + chain prerouting { + type filter hook prerouting priority -300; policy accept + + iif lo accept + + # always do connection tracking for local IP's + ip6 saddr $local_ip6 accept + ip6 daddr $local_ip6 accept + + # avoid connection tracking for most Tor traffic + ip6 saddr $tor_net6 ip6 daddr != $local_net6 notrack + ip6 daddr $tor_net6 ip6 saddr != $local_net6 notrack + } +} |