[asterisk-users] SIP TLS not working, Asterisk 16.9.0

[Karsten Wemheuer]

Hi,

I have problems with SIP via TLS. Asterisk works as a client. The TCP
connection is established, followed by a client hello from Asterisk to
the server. The server sends Server Hello, Certificate, Server Key
Exchange and Server Hello Done.

Than Asterisk sends back a Alert (Level: Fatal, Description Handshake
Failure). The following line appears in the log:

ast_iostream_start_tls: Problem setting up ssl connection:
error:00000001:lib(0):func(0):reason(1), Internal SSL error

Asterisk version is 16.9.0, openssl is 1.1.1d-0+deb10u2 of debian
Buster.

The configuration works with Asterisk 11.25 and openssl 1.0.1.

Any hints on how to find the error?

Best regards,

Karsten