So if you’re having some issues with SSL connections, it’s higly likely you’re experiencing them from client version openssl 1.0.2. the fix is below and i can confirm it works on both openssl 1.0.1 and 1.0.2.
openssl s_client -connect yourdomain.com:5671 -showcerts
CONNECTED(00000003)
write:errno=104
—
no peer certificate available
—
No client certificate CA names sent
—
SSL handshake has read 0 bytes and written 305 bytes
—
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : 0000
Session-ID:
Session-ID-ctx:
Master-Key:
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1484575655
Timeout : 300 (sec)
Verify return code: 0 (ok)
—
openssl s_client \
-cipher RSA \
-connect mydomain.com:5671 \
-servername mydomain.com \
-cert client/cert.pem \
-key client/key.pem \
-CAfile testca/cacert.pem \
-tls1_2
Enjoy!