> I don't 100% agree, IANA have a web page with this info and they keep it
up
> to date, allocations out of the "reserved" address space are not done very
> frequently, usually every 3-4 months max. When a new block is allocated it
> usually is done way ahead of time and it usually takes months before
> anything is in the BGP table. Also, IANA do announce on various mailing
> lists when they update the allocation list. So I see nothing wrong with
> denying any non allocated address space.
>
> If one is worried about forgetting about it, there are many way of
checking
> if there has been an update, no need to list them here I think everyone
has
> his favorite script in mind.

http://zebra.swinog.ch/wwwbin/badnetworks

gives a summary of 'bad networks'

 - IANA Reserved
 - RFC1918
 - /0 to /7 and /30 to /32

you also see from which network the RouteServer is receiving the route, so
if you see the route comming only from one or two peers it's probably kept
internally (like IP-Plus with their 0.0.0.0/1 128.0.0.0/2 220.0.0.0/7 and
10.11.17.0/24).


sincerly,
Pascal

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