nanog mailing list archives

Re: uPRF strict more


From: Nick Hilliard <nick () foobar org>
Date: Wed, 29 Sep 2021 10:12:32 +0100

Saku Ytti wrote on 29/09/2021 07:03:
Having said that, I'm not convinced anyone should use uRPF at all.
Because you should already know what IP addresses are possible behind
the port, if you do, you can do ACL, and ACL is significantly lower
cost in PPS in a typical modern lookup engine.

urpf has its place if your network config build processes aren't automated to the point that it's no longer necessary. It would be a net security loss to the internet not to have it widely implemented on access devices.

Nick


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