2015-09-25 - News - Tony Finch
You should be aware of our previous announcements about changing the status of 10.128.0.0/9 to CUDN-wide private address space.
- http://news.uis.cam.ac.uk/articles/2015/07/24/reassignment-of-10-128-0-0-9-to-cudn-wide-private-address-space
- http://news.uis.cam.ac.uk/articles/2015/09/17/10-128-0-0-9-reassignment-and-university-wireless-address-changes
The central name servers now have DNS zones for 10.128.0.0/9. There are not yet any registrations in this address space, so the zones are currently almost empty. We have updated the name server configuration advice to cover these new zones.
https://jackdaw.cam.ac.uk/ipreg/nsconfig/
On the CUDN the RFC 1918 address block 10.0.0.0/8 is divided in two. The bottom half, 10.0.0.0/9, is for institution-private usage and is not routed on the CUDN. The top half, 10.128.0.0/9, was previously reserved; it has now been re-assigned as CUDN-wide private address space.
To provide DNS for 10.0.0.0/8 we have a mechanism for conveniently
sharing the zone 10.in-addr.arpa between institution-private and
CUDN-wide private uses. The arrangement we are using is similar to the
way 128.232.0.0/16 is divided between the Computer Lab and the rest
of the University.
We have two new zones for this address space,
10.in-addr.arpain-addr.arpa.private.cam.ac.uk
The sample nameserver configuration has been updated to include them.
Institutions that are using the bottom half, 10.0.0.0/9, should
provide their own version of 10.in-addr.arpa
with DNAME redirections to in-addr.arpa.private.cam.ac.uk for the
CUDN-wide addresses.