An update:
- fmhy.ml is gone, due to the ongoing fiasco with mali government taking all their .ml domains back
- As such, lemmy.fmhy.ml is also gone, we are currently exploring ways to refederate (or somehow restart federation entirely) without breaking anything substantial
- We have backups, so don’t worry about data loss (you can view them on other instances anyway)
Currently, we have fmhy.net and are exploring options to somehow migrate, thank you for your patience.
Possibly. I think mastadon has been around a bit longer though? Not sure why the old domain must be up. Unless they don’t store public keys of known instances and they rely on DNS for the security.
e.g. Instance A signs a request, Instance B queries Instance A via DNS lookup (as is normal) and checks public key confirms signature and allows it.
I got curious so I start digging into how mastodon do it. It’s more like a hack, really. Mastodon uses WebFinger to resolve user account, so when you change domain, you can leave the old domain up so your federated servers can still resolve your users and realized the domain has been changed and update their federation data. But it turns out you can’t exactly retire the old domain either because it’s still tied to user account internally. So if you lose control of your old domain, you’re probably as screwed as fmhy.ml.