Todd Underwood was a little late

Chris Adams cmadams at
Fri Jun 18 12:49:55 UTC 2010

Once upon a time, Steve Bertrand <steve at> said:
> If all IP blocks are tied down to null, and urpf is enabled in loose
> mode on an interface, it will catch cases where someone is sourcing
> traffic to you using IPs from the unassigned space that you have in your
> free pools.

That's not true on JUNOS devices - discard routes still count as valid
routes for loose-mode uRPF.
Chris Adams <cmadams at>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

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