Randy, great question. I'm teaching that it's very rarely, if ever, used (due to high potential for benign loss); it's always great to be either confirmed or corrected... 

So if anyone replies just to Randy - pls cc me too (or, Randy, if you could sum up and send to list or me - thanks!)

Amir
--
Amir Herzberg

Comcast professor of Security Innovations, Computer Science and Engineering, University of Connecticut
`Applied Introduction to Cryptography' textbook and lectures: https://sites.google.com/site/amirherzberg/applied-crypto-textbook




On Tue, Sep 28, 2021 at 8:50 PM Randy Bush <randy@psg.com> wrote:
do folk use uPRF strict mode?  i always worried about the multi-homed
customer sending packets out the other way which loop back to me;  see
RFC 8704 §2.2

do vendors implement the complexity of 8704; and, if so, do operators
use it?

clue bat please

randy