[gnutls-help] debugging "(gnutls_handshake): No supported cipher suites have been found"

Andreas Metzler ametzler at bebt.de
Sat May 1 18:19:39 CEST 2021

On 2021-02-20 Andreas Metzler <ametzler at bebt.de> wrote:
> looking at my mail server logs I have found 

> 2021-02-20 12:13:53 TLS error on connection from [...] (gnutls_handshake): No supported cipher suites have been found.

> for incoming connections, outgoing connections to the same host succeed
> with X=TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_256_GCM:256

> My host is running Debian/stable (gnutls 3.6.7), I have also tried with
> gnutls 3.6.15 or with priorities NORMAL:-VERS-TLS1.3 or NORMAL:%COMPAT.


Looks like the connecting hosts did not like the secp384r1 certificate.
I have now also got an rsa certificate and let exim show both.

cu Andreas
`What a good friend you are to him, Dr. Maturin. His other friends are
so grateful to you.'
`I sew his ears on from time to time, sure'

More information about the Gnutls-help mailing list