Would it be possible for me to make comments to other instances etc?
Solved: I can’t, it would only work with a public domain.
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Letsencrypt provides free certificates. It’s very easy to get one from them.
If they’re easy to get, why have them 😑
I’m not sure I understand the question. They are used to encrypt traffic and prove that the entity hosting the site hasn’t changed by using a digital signature. These two together make it so third parties can’t read the traffic coming through. This is a requirement for modern internet. Otherwise your passwords wouldn’t be a secret because literally anyone would see them.
Because then you can encrypt your traffic with HTTPS 🙃
This is madness 🤯
If they’re easy to get, why not have them 😉