How to debug a TLSv1.3 protocol problem?

Claus Assmann ca+ssl-users at esmtp.org
Wed May 20 13:24:30 UTC 2020


On Wed, May 20, 2020, Matt Caswell wrote:

> I wonder if there could be some middlebox in between these two peers
> that is interfering with the connection in some way and arbitrarily
> closing it down?

No, it's being tested on localhost.  And it works fine if I use a
different server (e.g., openssl s_server) or a different client,
i.e., it is (so far) only this specific combination (M1 -> S8)
which does not work.


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