Cogent BCP-38

Robert Blayzor rblayzor.bulk at
Tue Aug 29 00:38:53 UTC 2017

> On Aug 17, 2017, at 9:11 AM, William Herrin <bill at> wrote:
> Doesn't loose mode URPF allow packets from anything that exists in the
> routing table regardless of source? Seems just about worthless. You're
> allowing the site to spoof anything in the routing table which is NOT
> BCP38.

Well not completely useless. BCP will still drop BOGONs at the edge before they leak into your network.


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