SSL problems with xymon

Recently I got an error with a perfectly valid certificate in xymon.


Xymon reports


red Fri Nov 22 09:50:20 2019: SSL error


red https://www.su.dk/ - SSL error


Seconds: 0.261158000


Trying  to access the site using firefox from Xymon server doesn?t report any error:


[cid:image001.png at 01D5A11B.2B073820]


 Testing the certificate using openssl doesn't look right:


echo| openssl s_client -connect www.su.dk:443<http://www.su.dk:443>;

CONNECTED(00000003)
write:errno=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 289 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
    Krb5 Principal: None
    PSK identity: None
    PSK identity hint: None
    Start Time: 1574412455
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)

Testing other sites using the same method works fine for other sites.


What can I do to solve this problem? How do I proceed?

If I'm missing some information - pease let med know.


Med venlig hilsen/Kind Regards


Leif Sommerdal