Hello, Leshax.

In terms of exposing UltiDev Cassini-hosted applications on the Internet, it is no different from any other web server. If your Cassini-hosted application is accessible on the Internet by an IP address, you need to register a domain name with a public domain registrar and set up a DNS server, which can be provided by domain name registrar or be a third-party service, like http://freedns.afraid.org/, linking together domain name a the IP address.

The one thing to consider, though, is that UltiDev Cassini service (and all its hosted web applications) run under powerful Local System account. If an application or Cassini itself get hacked, attacker will have access to entire system and all drives and folders. It is safer to employ new UltiDev Web Server Pro with application host process running under restricted "Network Service" account.

Please let us know if this information was helpful.

Best regards,
UltiDev Team.