It’s a link that’s base64 encoded. Decide it with something like https://www.base64decode.org

Looks interesting. What do you do for mobile devices that need to connect to your network?

I read about mastodon comments previously, I think it was this article https://carlschwan.eu/2020/12/29/adding-comments-to-your-static-blog-with-mastodon/

Commento looked interesting the last time I was searching for an option.

Or since you’re on the fediverse already, there’s webmentions.