SSL cert issues

Seth David Schoen schoen at
Wed Sep 21 23:26:38 UTC 2022

Jan Schaumann via NANOG writes:

> Mark Stevens <manager at> wrote:
> > Is anyone else getting the following error when trying to access any of
> > google's services?
> Isn't this usually a sign of a protocol mismatch?
> I.e., TLS 1.3 vs TLS 1.2.

The most common protocol mismatch that causes this is speaking HTTPS to
an HTTP port.  For instance, you can see this error at normal times with
URLs like

If you get some misconfiguration where port 443 is speaking HTTP instead
of HTTPS, you'll see the same error.

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