If you want to stream via an external profile over the Internet, the premium version is required to create a second profile.
To access the receiver from the Internet, the receiver must be accessible via the Internet. Since IP addresses usually change, you should use a provider for dynamic IP addresses (dyndns.org, twodns.de ...) to access the receiver via a hostname.
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The following steps are necessary:
If the message "IP address rejected" appears, this is related to a new version of the OpenWebif. It is necessary to use username/password. Additionally HTTPS is recommended.
If you set up a VPN access from your mobile phone to your home network, no further profile needs to be created. The receiver should then be accessible via the internal IP address. You may also have to set in the settings of OpenWebif that access via VPN is allowed.