The SSL module is enabled by default in the global server configuration. In case it has been disabled on your host, activate it with the following command: a2enmod ssl. To finally enable SSL, the server needs to be started with the flag “SSL”. To do so, call a2enflag SSL (case-sensitive!). If you have chosen to encrypt your server certificate with a password, you should also increase the value for APACHE_TIMEOUT in /etc/sysconfig/apache2, so you have enough time to enter the passphrase when Apache starts. Restart the server to make these changes active. A reload is not sufficient.
Creating a Self-Signed Certificate on SUSE 12:
root# openssl req -new > vhostname.csr
root# openssl rsa -in privkey.pem -out vhostname.key
root# openssl x509 -in vhostname.csr -out journal.crt -req -signkey vhostname.key -days 3650
Copy the certificate files to the relevant directories, so that the Apache server can read them. Make sure that the private key /etc/apache2/ssl.key/vhostname.key is not world-readable, while the public PEM certificate /etc/apache2/ssl.crt/vhostname.crt is.