Sky blocks Newzbin, important legal and technical questions need answering

James Firth james2 at
Fri Dec 16 12:46:39 GMT 2011

Ian Batten wrote:
> ... there's no reason for a small hosting company to allocate each
> customer a /64 ...

AFAIU there is. RFC2373 reserves those bits for interface identifiers
(obviously a privacy nightmare) and RIPE IPv6 Address Allocation and
Assignment Policy (ss5.4.1) states 

"The size of the assignment is a local decision for the LIR or ISP to make,
using a minimum value of a /64 (only one subnet is anticipated for the End

Therefore it would be reasonable for any network blocking of IPv6 to block
with a mask of /64.

> Frequency-agile IPv6
> communications, with blocking entire /64s the only option for the
> blocker.  Fun for all the family.

See above.

James Firth

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