SSL Error resulting in License Error - Graylog Enterprise

We are using the free Graylog Enterprise License version 2.4.6. Since the past few days we are getting a license violation error message in the Web UI.

Things i have verified:

Output of CURL command:

ubuntu@graylog:~$ curl -v -XGET

  • Rebuilt URL to:
  • Hostname was NOT found in DNS cache
  • Trying…
  • Connected to ( port 443 (#0)
  • successfully set certificate verify locations:
  • CAfile: none
    CApath: /etc/ssl/certs
  • SSLv3, TLS handshake, Client hello (1):
  • Unknown SSL protocol error in connection to
  • Closing connection 0
    curl: (35) Unknown SSL protocol error in connection to

Thanks in advance

Thanks in advance

your system does not contain any CA files - so the certificate can’t be verified …

please check your Graylog server.log it should give you some hints on this.

Hello Jan,
Thanks. I am using the training VM ( OVA file) as ours is a test environment. I see lot of certificates present under /etc/ssl/certs directory. Is there any in particular that we should be looking for ?

/var/log/syslog doesn’t have anything related to ssl certs.

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