### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
###--------------------------------------------------------------------------
+### Local configuration.
+
+m4_divert(6)m4_dnl
+## Default NTP servers.
+defconf(ntp_servers,
+ "158.152.1.76 158.152.1.204 194.159.253.2 195.173.57.232")
+
+m4_divert(-1)
+###--------------------------------------------------------------------------
### Packet classification.
## Define the available network classes.
m4_divert(42)m4_dnl
-defnetclass untrusted untrusted trusted
-defnetclass trusted untrusted trusted safe noloop
-defnetclass safe trusted safe noloop
-defnetclass noloop trusted safe
-m4_divert(-1)m4_dnl
+defnetclass untrusted untrusted trusted mcast
+defnetclass trusted untrusted trusted safe noloop mcast
+defnetclass safe trusted safe noloop mcast
+defnetclass noloop trusted safe mcast
+defnetclass link
+defnetclass mcast
+m4_divert(-1)
+m4_divert(26)m4_dnl
###--------------------------------------------------------------------------
### Network layout.
-m4_divert(46)m4_dnl
-## Networks and routing.
-
-defiface $if_untrusted \
- untrusted:172.29.198.0/25
-defvpn $if_vpn safe 172.29.199.128/27 \
- crybaby:172.29.199.129 \
- terror:172.29.199.130
-defiface $if_iodine untrusted:172.29.198.128/28
-defiface $if_its_mz safe:172.29.199.160/30
-defiface $if_its_pi safe:192.168.0.0/24
-defiface $if_trusted \
- trusted:172.29.199.0/26 \
- safe:172.29.199.64/27 \
- untrusted:default
-
-m4_divert(60)m4_dnl
+## House networks.
+defnet dmz trusted
+ addr 62.49.204.144/28 2001:470:1f09:1b98::/64
+ forwards unsafe untrusted
+defnet unsafe trusted
+ addr 172.29.199.0/25 2001:470:9740:1::/64
+ forwards househub
+defnet safe safe
+ addr 172.29.199.192/27 2001:470:9740:4001::/64
+ forwards househub
+defnet untrusted untrusted
+ addr 172.29.198.0/25 2001:470:9740:8001::/64
+ forwards househub
+defnet iodine untrusted
+ addr 172.29.198.128/28
+
+defnet househub virtual
+ forwards housebdry dmz unsafe safe untrusted
+defnet housebdry virtual
+ forwards househub hub
+ noxit dmz
+
+## House hosts.
+defhost radius
+ hosttype router
+ iface eth0 dmz unsafe safe untrusted vpn sgo colobdry default
+ iface eth1 dmz unsafe safe untrusted vpn sgo colobdry default
+ iface eth2 dmz unsafe safe untrusted vpn sgo colobdry
+ iface eth3 untrusted vpn default
+ iface t6-he default
+ iface vpn-precision colobdry vpn sgo
+ iface vpn-chiark sgo
+ iface vpn-+ vpn
+defhost roadstar
+ iface eth0 dmz unsafe
+ iface eth1 dmz unsafe
+defhost jem
+ iface eth0 dmz unsafe
+ iface eth1 dmz unsafe
+defhost artist
+ hosttype router
+ iface eth0 dmz unsafe
+ iface eth1 dmz unsafe
+ iface eth3 untrusted
+defhost vampire
+ hosttype router
+ iface eth0.4 dmz unsafe untrusted safe vpn sgo colobdry
+ iface eth0.5 dmz unsafe untrusted safe vpn sgo colobdry
+ iface eth0.6 dmz unsafe safe untrusted vpn sgo colobdry
+ iface eth0.7 untrusted
+ iface dns0 iodine
+ iface vpn-precision colobdry vpn sgo
+ iface vpn-chiark sgo
+ iface vpn-+ vpn
+defhost ibanez
+ iface br-dmz dmz unsafe
+ iface br-unsafe unsafe
+
+defhost gibson
+ hosttype client
+ iface eth0 unsafe
+
+## Colocated networks.
+defnet jump trusted
+ addr 212.13.198.64/28 2001:ba8:0:1d9::/64
+ forwards colohub
+defnet colo trusted
+ addr 172.29.199.176/28 2001:ba8:1d9:2::/64
+ forwards colohub
+defnet colohub virtual
+ forwards colobdry jump colo
+defnet colobdry virtual
+ forwards colohub hub
+ noxit jump
+
+## Colocated hosts.
+defhost fender
+ iface br-jump jump colo
+ iface br-colo jump colo
+defhost precision
+ hosttype router
+ iface eth0 jump colo sgo
+ iface eth1 jump colo sgo
+ iface vpn-radius housebdry vpn sgo
+ iface vpn-chiark sgo
+ iface vpn-+ vpn
+defhost telecaster
+ iface eth0 jump colo
+ iface eth1 jump colo
+defhost stratocaster
+ iface eth0 jump colo
+ iface eth1 jump colo
+defhost jazz
+ iface eth0 jump colo
+ iface eth1 jump colo
+
+## Other networks.
+defnet hub virtual
+ forwards housebdry colobdry
+defnet sgo noloop
+ addr !172.29.198.0/23
+ addr 10.0.0.0/8
+ addr 172.16.0.0/12
+ addr 192.168.0.0/16
+ forwards househub colohub
+defnet vpn safe
+ addr 172.29.199.128/27 2001:ba8:1d9:6000::/64
+ forwards househub colohub
+ host crybaby 1
+ host terror 2
+defnet anycast trusted
+ addr 172.29.199.224/27 2001:ba8:1d9:0::/64
+ forwards dmz unsafe safe untrusted jump colo vpn
+defnet default untrusted
+ addr 62.49.204.144/28 2001:470:1f09:1b98::/64
+ addr 212.13.198.64/28 2001:ba8:0:1d9::/64
+ addr 2001:ba8:1d9::/48 #temporary
+ forwards dmz unsafe untrusted jump colo
+
+m4_divert(80)m4_dnl
###--------------------------------------------------------------------------
### Special forwarding exemptions.
-## Allow ping from safe/noloop to untrusted networks.
-run iptables -A FORWARD -j ACCEPT \
- -p icmp ! -f --icmp-type echo-request \
- -m mark --mark $to_untrusted/$MASK_TO
-run iptables -A FORWARD -j ACCEPT \
- -p icmp ! -f --icmp-type echo-reply \
- -m mark --mark $from_untrusted/$MASK_FROM \
- -m state --state ESTABLISHED
-run ip6tables -A FORWARD -j ACCEPT \
- -p ipv6-icmp --icmpv6-type echo-request \
- -m ipv6header --soft ! --header frag \
- -m mark --mark $to_untrusted/$MASK_TO
-run ip6tables -A FORWARD -j ACCEPT \
- -p ipv6-icmp --icmpv6-type echo-reply \
- -m ipv6header --soft ! --header frag \
- -m mark --mark $from_untrusted/$MASK_FROM \
- -m state --state ESTABLISHED
-
-## Allow SSH from safe/noloop to untrusted networks.
-run iptables -A FORWARD -j ACCEPT \
- -p tcp ! -f --destination-port $port_ssh \
- -m mark --mark $to_untrusted/$MASK_TO
-run iptables -A FORWARD -j ACCEPT \
- -p tcp ! -f --source-port $port_ssh \
- -m mark --mark $from_untrusted/$MASK_FROM \
- -m state --state ESTABLISHED
-run ip6tables -A FORWARD -j ACCEPT \
- -p tcp --destination-port $port_ssh \
- -m ipv6header --soft ! --header frag \
- -m mark --mark $to_untrusted/$MASK_TO
-run ip6tables -A FORWARD -j ACCEPT \
- -p tcp --source-port $port_ssh \
- -m ipv6header --soft ! --header frag \
- -m mark --mark $from_untrusted/$MASK_FROM \
- -m state --state ESTABLISHED
+case $forward in
+ 1)
+
+ ## Only allow these packets if they're not fragmented. (Don't trust safe
+ ## hosts's fragment reassembly to be robust against malicious fragments.)
+ ## There's a hideous bug in iptables 1.4.11.1 which botches the meaning
+ ## of `! -f', so we do the negation using early return from a subchain.
+ clearchain fwd-spec-nofrag
+ run iptables -A fwd-spec-nofrag -j RETURN --fragment
+ run ip6tables -A fwd-spec-nofrag -j RETURN \
+ -m ipv6header --soft --header frag
+ run ip46tables -A FORWARD -j fwd-spec-nofrag
+
+ ## Allow ping from safe/noloop to untrusted networks.
+ run iptables -A fwd-spec-nofrag -j ACCEPT \
+ -p icmp --icmp-type echo-request \
+ -m mark --mark $to_untrusted/$MASK_TO
+ run iptables -A fwd-spec-nofrag -j ACCEPT \
+ -p icmp --icmp-type echo-reply \
+ -m mark --mark $from_untrusted/$MASK_FROM \
+ -m state --state ESTABLISHED
+ run ip6tables -A fwd-spec-nofrag -j ACCEPT \
+ -p icmpv6 --icmpv6-type echo-request \
+ -m mark --mark $to_untrusted/$MASK_TO
+ run ip6tables -A fwd-spec-nofrag -j ACCEPT \
+ -p icmpv6 --icmpv6-type echo-reply \
+ -m mark --mark $from_untrusted/$MASK_FROM \
+ -m state --state ESTABLISHED
+
+ ## Allow SSH from safe/noloop to untrusted networks.
+ run ip46tables -A fwd-spec-nofrag -j ACCEPT \
+ -p tcp --destination-port $port_ssh \
+ -m mark --mark $to_untrusted/$MASK_TO
+ run ip46tables -A fwd-spec-nofrag -j ACCEPT \
+ -p tcp --source-port $port_ssh \
+ -m mark --mark $from_untrusted/$MASK_FROM \
+ -m state --state ESTABLISHED
+
+ ;;
+esac
m4_divert(80)m4_dnl
###--------------------------------------------------------------------------
+### Kill things we don't understand properly.
+###
+### I don't like having to do this, but since I don't know how to do proper
+### multicast filtering, I'm just going to ban it from being forwarded.
+
+errorchain poorly-understood REJECT
+
+## Ban multicast destination addresses in forwarding.
+case $forward in
+ 1)
+ run iptables -A FORWARD -g poorly-understood \
+ -d 224.0.0.0/4
+ run ip6tables -A FORWARD -g poorly-understood \
+ -d ff::/8
+ ;;
+esac
+
+m4_divert(84)m4_dnl
+###--------------------------------------------------------------------------
### Locally-bound packet inspection.
clearchain inbound
run ip46tables -A INPUT -m mark --mark $from_untrusted/$MASK_FROM -g inbound
## Otherwise process as indicated by the mark.
-for i in INPUT FORWARD; do
+for i in $inchains; do
run ip46tables -A $i -m mark ! --mark 0/$MASK_MASK -j ACCEPT
done
~mdw / firewall / blobdiff