Re: ARIN space not accepted

[Steven Bellovin <smb () cs columbia edu>]

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

> > From: Valdis.Kletnieks () vt edu
> > > From: Valdis.Kletnieks () 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