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Option 3: Vaultwarden + Wireguard.
I don't have to worry about attacks from the internet. And a single wireguard connection on my phone sometimes doesn't even appear on the battery stats.
Edit: Browser addons need valid ssl certificates, which I get by dns challenge.
could you expand a bit on your edit? so bitwarden extensions need a valid ssl certificate for the domain where the server is hosted? how do you get that for (i assume) a local domain? thank you for your time!
DNS-01 challenge allows for domain ownership verification without open ports and instead looks for a txt record. Using a tool like lego[1] with the respective dns provider's API automatically creates and deletes the txt record after generating a certificate.
Because ownership is verified by dns txt entry, the (sub-)domain doesn't have to point to a publicly routable host. This allows for using any IP, so I'm using a local ip only available through wireguard or my local network (E.g. bitwarden.example.com points to 192.168.1.123).
The disadvantage is that the provider has to be supported and you have to store an API key for your domain on the server.
[1] https://github.com/go-acme/lego
that's genius. i have never even considered that you could use a (sub)domain with a local ip like that to get a certificate from a trusted ca. i ma not sure i understand the neccessity for api access to your dns service. is the txt record for LE different every time you have to pass a challenge? otherwise i imagine you could just set and forget the record.
thank you for the explanation, well appreciated!
Yes it's awesome. I never even considered that it's possible to add not publicly routable IP's to public DNS server, until I recently read a post about dns-01 challenge.
I believe the txt record is different every time.