[dns-operations] About EDNS0

[Davey Song]

Hi, everybody

I’m a newbie on this mailing list. Hope you guys forgive my carelessness on
previous discussion on the same question.

My question is that I heard that EDNS0 does not work well because the
misbehavior of mid-box like firewall or IPS which degrade the function of
EDNS0. I wondering if there is any measurement report or statistic which
support this point and show how severe it is.

Thank you!
Davey
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