Is it time to abandon bogon prefix filters?
Patrick W. Gilmore
patrick at ianai.net
Wed Aug 6 09:55:44 CDT 2008
On Aug 6, 2008, at 10:28 AM, Rob Thomas wrote:
> This makes sense especially for static filters. Automated feeds,
> such as the bogon route-server or DNS zones, leaves folks with
Honestly, I don't believe the 80/20 rules applies here.
Until all transit networks are willing to strictly filter their
downstreams (and themselves!), if there is any unused space (note I
said "unused", not "unallocated"), the miscreants will use it. They
are not going around saying "oh, damn, there are only a few /8s left,
we better stop!".
Filter your bogons. But do it in an automated fashion, from a trusted
Of course, I recommend Team Cymru, which has a most sterling record.
Nearly perfect (other than the fact they still recommend MD5 on BGP
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