openssl connection on a self-cerficated server - ssl

Question

I'm performing this command in order to check whether I'm able to create a SSL connection:
openssl s_client -connect private-server:5000
private-server is a server I've set up with a self-generated certificate.
The output is:
CONNECTED(00000003)
140180300502672:error:140790E5:SSL routines:ssl23_write:ssl handshake failure:s23_lib.c:177:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 308 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: 1467812448
Timeout : 300 (sec)
Verify return code: 0 (ok)
---
What I need to get the connection right?
Thanks.

Answer 1

SSL handshake has read 0 bytes and written 308 bytes
The client has started with the SSL handshake but the server has closed the connection without sending anything back. There might be a lot of reasons for this like a firewall blocking the connection, various configuration errors on the server, server not expecting TLS at all, server expecting SNI ...
Unfortunately it can not be said from the information you provide which exactly is the cause of the problem. You might try with different clients (browser) to find out, if the problem is more at the server or middlebox site (i.e. none of the clients work) or if it is more a problem which can maybe fixed on the client site (some clients work, others not).