UNIX for Beginners Questions & Answers

SSL_ERROR_SYSCALL
Some I/O error occurred. The OpenSSL error queue may contain more information on the error. If the error queue is empty (i.e. ERR_get_error() returns 0),
ret can be used to find out more about the error: If ret == 0, an EOF was observed that violates the protocol. If ret == -1, 
the underlying BIO reported an I/O error (for socket I/O on Unix systems, consult errno for details).

openssl s_client -showcerts -connect qa-api.ncl.com:443
CONNECTED(00000003)
write:errno=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 247 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE

openssl s_client -showcerts -connect qa-api.ncl.com:443 -servername qa-api.ncl.com

openssl s_client -showcerts -connect qa-api.ncl.com:443 -tls1_2

 openssl s_client -showcerts -connect qa-api.ncl.com:443 -tls1_2
CONNECTED(00000003)
write:errno=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 0 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : 0000
    Session-ID:
    Session-ID-ctx:
    Master-Key:
    Key-Arg   : None
    Krb5 Principal: None
    PSK identity: None
    PSK identity hint: None
    Start Time: 1516749422
    Timeout   : 7200 (sec)
    Verify return code: 0 (ok)
---