You can look at the Instances link bottom of page on the instance itself, in this case lemmy.dbzer0.com/instances. You can append /instances to any Lemmy address to see what's blocked or linked on that particular instance. It looks like you're on ursal.zone which shows as linked for lemmy.dbzer0.com
It goes both ways so you need to check lemmy.dbzer0.com is not blocked on your sign-in instance. I don't know how to look that up on Mastadon since I only use Lemmy/Kbin.
@db0@piracy@amazing_Yasuke@kariboka that is a terrible idea if there is no specific reason for it. Anybody should be able to start up an instance and see posts on your instance - as I have done.
@immibis@piracy@amazing_Yasuke@kariboka You don't need to start an instance to do that, you can do it anonymously as well. The whitelisting is to prepare against spammers. Anyway whoever doesn't want to use it, doesn't have to.
@db0@piracy@amazing_Yasuke@kariboka yes, well, please don't enable it except when your server is experiencing spam problems. If this is what's being used on your server, apparently it does not just block people from commenting on your server, but also blocks them from seeing the content on your server, which is not a necessary anti-spam measure.
@db0@piracy@amazing_Yasuke@kariboka Nope, shows as linked, and I don't see any such status page on my end (Pleroma) so I'm going to guess it's probably some bug in the interaction between Pleroma and Lemmy
@immibis@db0@piracy@kariboka probably. I just saw a recent post over on lemmy that said some insurances of kbin don’t work with lemmy correctly and some request are blocked on one side.
Kari'boka :v_com:@ursal.zone to 
Received over on aussie.zone fine.
@kariboka @db0 @piracy shows up on my mastodon feed currently.
You can look at the Instances link bottom of page on the instance itself, in this case lemmy.dbzer0.com/instances. You can append /instances to any Lemmy address to see what's blocked or linked on that particular instance. It looks like you're on ursal.zone which shows as linked for lemmy.dbzer0.com
It goes both ways so you need to check lemmy.dbzer0.com is not blocked on your sign-in instance. I don't know how to look that up on Mastadon since I only use Lemmy/Kbin.
I see it federated
@kariboka @db0 @piracy
@amazing_Yasuke pointed out that db0 has made some kind of automated blacklist system called fediseer. https://github.com/db0/fediseer
@immibis @piracy @amazing_Yasuke @kariboka Also building it up to do whitelisting as well
@db0 @piracy @amazing_Yasuke @kariboka that is a terrible idea if there is no specific reason for it. Anybody should be able to start up an instance and see posts on your instance - as I have done.
@immibis @piracy @amazing_Yasuke @kariboka You don't need to start an instance to do that, you can do it anonymously as well. The whitelisting is to prepare against spammers. Anyway whoever doesn't want to use it, doesn't have to.
@db0 @piracy @amazing_Yasuke @kariboka yes, well, please don't enable it except when your server is experiencing spam problems. If this is what's being used on your server, apparently it does not just block people from commenting on your server, but also blocks them from seeing the content on your server, which is not a necessary anti-spam measure.
@immibis @piracy @amazing_Yasuke @kariboka The whitelist is not currently in use on lemmy.dbzer0.com. It's not populated enough for production use
@db0 @piracy @amazing_Yasuke @kariboka then the problem which prevents me seeing new posts is something else entirely. Am I blacklisted?
@immibis @piracy @amazing_Yasuke @kariboka Are you in this blacklist? https://lemmy.dbzer0.com/instances
@db0 @piracy @amazing_Yasuke @kariboka Nope, shows as linked, and I don't see any such status page on my end (Pleroma) so I'm going to guess it's probably some bug in the interaction between Pleroma and Lemmy
@immibis @piracy @amazing_Yasuke @kariboka it must be, yes
@immibis @db0 @piracy @kariboka probably. I just saw a recent post over on lemmy that said some insurances of kbin don’t work with lemmy correctly and some request are blocked on one side.
@amazing_Yasuke @immibis @piracy @kariboka I heard that too. Might be some issues with 0.18 hopefully will be fixed soon
@db0 @immibis @piracy @kariboka maybe because that’s just odd.
@immibis @db0 @piracy @kariboka interesting.
@kariboka @db0 @piracy Same here
Is it not? I'm not on lemmy.dbzer0.com and can see this.
I'm on lemmy.ml and it works