<VirtualHost %ipaddress%:443>
    ServerName directadmin-panel.customerdomain.com
    DocumentRoot /var/www/html
    ServerAdmin webmaster@directadmin-panel.customerdomain.com
    UseCanonicalName Off
    SSLEngine on

    SSLCertificateFile /path/to/certificate/for/directadmin-panel.customerdomain.com.pem
    SSLCertificateKeyFile /path/to/certificate/for/directadmin-panel.customerdomain.com.pem
    SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown

<IfModule mod_rewrite.c>
<IfModule core.c>
SSLProxyEngine On
SSLProxyVerify none
SSLProxyCheckPeerCN off
SSLProxyCheckPeerName off
</IfModule>

RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule ^/(.*) https://%ipaddress%:2222/$1 [P]
</IfModule>
</VirtualHost>