Listen 4050
<VirtualHost _default_:4050>
    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    SSLEngine on
    SSLCertificateFile /etc/ssl/certs/civiproxy.crt
    SSLCertificateKeyFile /etc/ssl/certs/civiproxy.key
</VirtualHost>