Hey guys,
I finally come around and started the journey of self-hosting and decided to get a VPS. After securing it, by making login via public-key default, I installed CasaOS and instantly regretted it since it now can be reached freely from the internet. A while ago, I read that you can limit the incoming connection to only VPN and ssh. And configured a Wireguard-VPN on the server via pivpn. But the server can still be reached from the internet. So what do I have to do now? Is it even the right choice, or am I missing something? How do you guys secure your VPS?
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You can, but you should configure your server in a way that this shouldn’t be a security feature of your setup (e.g. key-auth as OP did). It does help to cut back on uninvited guests a lot tho.