In server or proxy log (with GnuTLS 3.3.16)
Get value from agent failed: zbx_tls_connect(): gnutls_handshake() failed: \
-110 The TLS connection was non-properly terminated.
In server or proxy log (with OpenSSL 1.0.2c)
Get value from agent failed: TCP connection successful, cannot establish TLS to [[127.0.0.1]:10050]: \
Connection closed by peer. Check allowed connection types and access rights
In any log (with GnuTLS):
failed to accept an incoming connection: from 127.0.0.1: zbx_tls_accept(): gnutls_handshake() failed:\
-21 Could not negotiate a supported cipher suite.
In any log (with OpenSSL 1.0.2c):
failed to accept an incoming connection: from 127.0.0.1: TLS handshake returned error code 1:\
file .\ssl\s3_srvr.c line 1411: error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher:\
TLS write fatal alert "handshake failure"
Linux:
...In zbx_tls_init_child()
...OpenSSL library (version OpenSSL 1.1.1 11 Sep 2018) initialized
...
...In zbx_tls_connect(): psk_identity:"PSK test sender"
...End of zbx_tls_connect():FAIL error:'connection closed by peer'
...send value error: TCP successful, cannot establish TLS to [[localhost]:10051]: connection closed by peer
Windows:
...OpenSSL library (version OpenSSL 1.1.1a 20 Nov 2018) initialized
...
...In zbx_tls_connect(): psk_identity:"PSK test sender"
...zbx_psk_client_cb() requested PSK identity "PSK test sender"
...End of zbx_tls_connect():FAIL error:'SSL_connect() I/O error: [0x00000000] The operation completed successfully.'
...send value error: TCP successful, cannot establish TLS to [[192.168.1.2]:10051]: SSL_connect() I/O error: [0x00000000] The operation completed successfully.
LibreSSL does not support PSK.
In connecting-side log:
...TCP successful, cannot establish TLS to [[192.168.1.2]:10050]: SSL_connect() I/O error: [0] Success
In accepting-side log:
In Zabbix frontend:
Get value from agent failed: TCP successful, cannot establish TLS to [[192.168.1.2]:10050]: SSL_connect() I/O error: [0] Success
In connecting-side log:
...TCP successful, cannot establish TLS to [[192.168.1.2]:10050]: SSL_connect() set result code to SSL_ERROR_SSL: file ../ssl/record/rec_layer_s3.c line 1536: error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure: SSL alert number 40: TLS read fatal alert "handshake failure"
In accepting-side log: