I want to communicate with an iot device over the Internet when I am on vacation. However in order to minimize the risks I want to make sure that this device is the only accessible device and that a potential attacker would be only able to access this device and no other device or the internet if the password is hacked.
How can I achieve this? I think I should probably use a VPN, but which? If you have any recommendations i'd like to hear them.
Thank you for your advice. I was able to successfully setup a WireGuard VPN. However I have a ds-lite connection, therefore I need a portmapper or a similar service to reach my VPN from ipv4. In Germany we have the following service: https://www.feste-ip.net. It roughly costs 5$ per year. However it only supports TCP. Are there any similar cheap services for UDP (because WireGuard works with UDP) or do I need to switch to OpenVPN?