-## 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.
-
~mdw / firewall / blobdiff