Hello,

Is there a way in Gnutls to disable renogotiation on TLS and a way to disable 
client initiated secure renegotiation?

This is useful to harden the server. For example Exim4+Gnutls on Debian 10. 
There does not seem to be a need to support renegotiation or resumption on a 
mail server, because STARTTLS sessions are set up in each SMTP session. 
Disabling renegotiation reduces the attack surface.

Thanks

John
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