My current use case is I have an adguard home DNS filter that is currently blocking some lemmy servers. (eg: lemmynsfw)
I understand that it’ll cut out any direct resources from that lemmy server, but I suppose since it’s federated lemmy.world is acting as a proxy and thus the posts are still visible?
More generally speaking, is it possible to block an entire lemmy server at a network level? (DNS filtering or otherwise)
I don’t think this is possible through DNS filtering because it is your home lemmy instance showing you the results. You could block specific communities, turn off NSFW posts in your profile, or use a filter in Ublock Origin. These are all client-side solutions and would not auto-apply to a whole network. I don’t think there is a feature to block posts from a whole instance without being in charge of your own instance and de-federating. I would wager a per-user instance block will be coming down the pipe eventually.