You’re not entirely clear on whether you want these services accessible from the internet or just internally. If the latter, change ACME settings to use DNS challenges instead of HTTP. If the former, recheck your dns records, maybe post them here (censored if you wish).

Torrents are usually not downloaded in order but (for all intents and purposes) randomly. That means that, even though 10% might already be downloaded, it might just be the final 10% of the movie (or more realistically, random snippets scattered throughout the file).

There used to be some torrent clients that were able to do what you ask, request pieces in order only, but I don’t know if they are still around and they could potentially affect your download speed.

It’s surprising how much Hackers imagery is in all the results.