Can i using SSL without domain? What about other app on server?

[gas85]

@tiwi

I want http://myadress.com/admin to be able to connect to openvpn settings

What do you use as OpenVPN web Frontend?

Basically you can open only 443 and 80 Ports for this tast. Then you have 2 ways:

1. As you mentioned to access myadress.com/admin and myadress.com/nextcloud you have to create 1 Virtual Host under Apache2 and configure 2 directories, aliases, or proxy pass to your nextcloud and openvpn Settings fronted.
   In this case you will create e.g. http --> Port 80/443 on Apache2 --> OpenVPN (some other Port) or Nextcloud as directory.

2. You can register more domains e.g. cloud.myadress.com and openvpn.myadress.com and create Virtual host for each of them.

Here you can find few examples VirtualHost Examples - Apache HTTP Server Version 2.4

As mentioned here you can create config for Nexctloud e.g. under /etc/apache2/sites-enabled/nextcloud.conf and enable it.

@gas85

Alias /nextcloud /var/www/nextcloud/
Alias /javascript /usr/share/javascript/

<Directory /var/www/nextcloud/>
  Options +FollowSymlinks
  AllowOverride All

 <IfModule mod_dav.c>
  Dav off
 </IfModule>
 
 SetEnv HOME /var/www/nextcloud
 SetEnv HTTP_HOME /var/www/nextcloud

</Directory>