As of ownCloud release version 6 a new security feature was added, "Trusted Domain". This feature is allows only trusted URL URLs and/or IP addresses to access ownCloud. During the initial installation process for a new ownCloud instance the first trusted domain is captured (URL/IP address) and added to the ownCloud "config.php" file.

<blockquote>Any "untrusted" access will show an error message at the login session:<blockquote>