I am trying to redirect all SUBDOMAINS, except portal.example.com from any port (usually it's 80 or 443) to port 30000.

e.g.

* example.com: (any port) shall have no change
* [www.example.com](http://www.example.com): (any port) shall have no change
* portal.example.com (any port) shall have no change
* a.example.com (any port) shall be updated to a.example.com:30000
* b.example.com (any port) shall be updated to b.example.com:30000
* \*.example.com (any port) shall be updated to \*.example.com:30000
* etc.

I currently have following `.htaccess`, directing example.com and \*.example.com without change:

```
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

```