ARIN space not accepted

Steven Bellovin smb at cs.columbia.edu
Tue Dec 7 13:19:15 CST 2010


On Dec 4, 2010, at 1:43 09AM, Kevin Oberman wrote:

>> From: Valdis.Kletnieks at vt.edu
>>> From: Valdis.Kletnieks at vt.edu
>> Date: Fri, 03 Dec 2010 20:00:15 -0500
>> 
>> On Fri, 03 Dec 2010 14:24:16 PST, Leo Bicknell said:
>> 
>>> It is speculated that no later than Q1, two more /8's will be allocated,
>>> triggering a policy that will give the remaining 5 /8's out to the
>>> RIR's.  That means, prior to end of Q1, the bogon list will be:
>>> 
>>> 0/8
>>> 10/8
>>> 127/8
>>> 172.16/12
>>> 192.168/16
>>> 224/3
>> 
>> Oh. And don't forget to do *bidirectional* filtering of these addresses. ;)
> 
> Ahh, not quite. Blocking 224/3 bi-directionally might cause a few issues
> if you accept multicast traffic from anyone.

Bidirectional blocking of traffic with source addresses in 224/3 -- that should never happen unless I badly misunderstand multicast.


		--Steve Bellovin, http://www.cs.columbia.edu/~smb









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