GitHub Enterprise uses a self-signed SSL certificate to secure the configuration of your instance. You may see a warning about this in your web browser on the next screen, but rest assured this is expected and all is well.
Verifying the certificate's authenticity
$ ssh -p122 admin@ $ openssl x509 -fingerprint -in /etc/haproxy/ssl.crt -noout # SHA1 Fingerprint=9B:5E:CE:C4:B9:13:87:90:C2:6A:2E:89:36:11:78:2A:32:C8:01:BD