###--------------------------------------------------------------------------
### Packet classification.
+## IPv4 addressing.
+##
+## There are two small blocks of publicly routable IPv4 addresses, and a
+## block of RFC1918 private-use addresses allocated from the Cambridge G-RIN.
+## The former are as follows.
+##
+## 62.49.204.144/28
+## House border network (dmz). We have all of these, but .145
+## is reserved for the router.
+##
+## 212.13.18.64/28
+## Jump colocated network (jump). .65--68 are used by Jump
+## network infrastructure; we get the rest.
+##
+## The latter is the block 172.29.196.0/22. Currently the low half is
+## unallocated (and may be returned to the G-RIN); the remaining addresses
+## are allocated as follows.
+##
+## 172.29.198.0/24 Untrusted networks.
+## .0/25 house wireless net
+## .128/28 iodine (IP-over-DNS) network
+##
+## 172.29.199.0/24 Trusted networks.
+## .0/25 house wired network
+## .128/27 mobile VPN hosts
+## .160/28 reserved, except .160/30 allocated for ITS
+## .176/28 internal colocated network
+## .192/27 house safe network
+## .224/27 anycast services
+
+## IPv6 addressing.
+##
+## There are five blocks of publicly routable IPv6 addresses, though some of
+## them aren't very interesting. The ranges are as follows.
+##
+## 2001:470:1f08:1b98::/64
+## Hurricane Electric tunnel network: only :1 (HE) and :2
+## (radius) are used.
+##
+## 2001:470:1f09:1b98::/64
+## House border network (dmz).
+##
+## 2001:470:9740::/48
+## Main house range. See below for allocation policy.
+##
+## 2001:ba8:0:1d9::/64
+## Jump border network (jump): :1 is the router (supplied by
+## Jump); other addresses are ours.
+##
+## 2001:ba8:1d9::/48
+## Main colocated range. See below for allocation policy.
+##
+## Addresses in the /64 networks are simply allocated in ascending order.
+## The /48s are split into /64s by appending a 16-bit network number. The
+## top nibble of the network number classifies the network, as follows.
+##
+## 8xxx Untrusted
+## 6xxx Virtual
+## 4xxx Safe
+## 0xxx Unsafe, trusted
+##
+## These have been chosen so that network properties can be deduced by
+## inspecting bits of the network number:
+##
+## Bit 15 If set, the network is untrusted; otherwise it is trusted.
+## Bit 14 If set, the network is safe; otherwise it is unsafe.
+##
+## Finally, the low-order nibbles identify the site.
+##
+## 0 No specific site: mobile VPN endpoints or anycast addresses.
+## 1 House.
+## 2 Jump colocation.
+##
+## Usually site-0 networks are allocated from the Jump range to improve
+## expected performance from/to external sites which don't engage in our
+## dynamic routing protocols.
+
## Define the available network classes.
m4_divert(42)m4_dnl
defnetclass untrusted untrusted trusted mcast
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
## House hosts.
defhost radius
- router
- iface eth0 dmz unsafe safe
- iface eth1 dmz unsafe safe
- iface eth2 safe
- iface eth3 untrusted
+ 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 ppp0 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
iface eth0 dmz unsafe
iface eth1 dmz unsafe
defhost artist
- iface eth0 dmz unsafe
- iface eth1 dmz unsafe
+ hosttype router
+ iface eth0 dmz unsafe untrusted
+ iface eth1 dmz unsafe untrusted
+ iface eth3 untrusted
defhost vampire
- router
- iface eth0.0 dmz unsafe safe
- iface eth0.1 dmz unsafe safe
- iface eth0.2 safe
- iface eth0.3 untrusted
- iface dns0 iodine
- iface vpn-precision colobdry vpn
+ 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 vpn-precision colobdry vpn sgo
iface vpn-chiark sgo
iface vpn-+ vpn
defhost ibanez
iface br-unsafe unsafe
defhost gibson
+ hosttype client
iface eth0 unsafe
## Colocated networks.
addr 172.29.199.176/28 2001:ba8:1d9:2::/64
forwards colohub
defnet colohub virtual
- forwards colobdry jump colo
+ forwards colobdry jump colo iodine
defnet colobdry virtual
forwards colohub hub
noxit jump
+defnet iodine untrusted
+ addr 172.29.198.128/28
+ forwards colohub
## Colocated hosts.
defhost fender
iface br-jump jump colo
iface br-colo jump colo
defhost precision
- router
- iface eth0 jump colo
- iface eth1 jump colo
- iface vpn-vampire housebdry vpn
+ hosttype router
+ iface eth0 jump colo vpn sgo
+ iface eth1 jump colo vpn 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 jazz
- iface eth0 jump colo
- iface eth1 jump colo
+ hosttype router
+ iface eth0 jump colo vpn
+ iface eth1 jump colo vpn
+ iface dns0 iodine
+ iface vpn-+ vpn
## Other networks.
defnet hub virtual
-m state --state ESTABLISHED
## Allow SSH from safe/noloop to untrusted networks.
- run iptables -A fwd-spec-nofrag -j ACCEPT \
- -p tcp --destination-port $port_ssh \
- -m mark --mark $to_untrusted/$MASK_TO
- run iptables -A fwd-spec-nofrag -j ACCEPT \
- -p tcp --source-port $port_ssh \
- -m mark --mark $from_untrusted/$MASK_FROM \
- -m state --state ESTABLISHED
- run ip6tables -A fwd-spec-nofrag -j ACCEPT \
+ run ip46tables -A fwd-spec-nofrag -j ACCEPT \
-p tcp --destination-port $port_ssh \
-m mark --mark $to_untrusted/$MASK_TO
- run ip6tables -A fwd-spec-nofrag -j ACCEPT \
+ 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
~mdw / firewall / blobdiff