this post was submitted on 27 Jun 2023

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founded 1 year ago

Lemmy.ml is blocking all requests from /kbin Instances (kbin.social)

submitted 1 year ago by barista@kbin.social to c/fediverse@kbin.social

21 comments fedilink hide all child comments

I discovered yesterday evening that Lemmy.ml is blocking all inbound ActivityPub requests from /kbin instances. Specifically, a 403 'access denied' is returned when the user agent contains "kbinBot" anywhere in the string. This has been causing a cascade of failures with federation for many server owners, flooding the message queue with transport errors.

This doesn't appear to be a mistake; it has been done very deliberately, only on Lemmy.ml. Lemmy.world and other large instances do not exhibit the same behavior. It also isn't a side effect of the bug introduced in Lemmy 0.18. You can observe by sending the following in a terminal

> curl -I --user-agent "kbinBot v0.1" https://lemmy.world/u/test
HTTP/2 200
[...]

> curl -I --user-agent "kbinBot v0.1" https://lemmy.ml/u/test                                
HTTP/2 403
[...]

> curl -I --user-agent "notKbinBot v0.1" https://lemmy.ml/u/test
HTTP/2 403
[...]

> curl -I --user-agent "placeholder-user-agent" https://lemmy.ml/u/test
HTTP/2 200
[...]

Additional evidence of this not being a Lemmy 0.18 bug:

This occurs when making web requests to any location on the Lemmy.ml webserver, not just ActivityPub endpoints.
Go to https://fedidb.org/software/lemmy and pick an instance running 0.18.0. Perform the above commands, replacing the URL for Lemmy.ml with that particular instance's address.

If this continues, my instance may need to defederate from Lemmy.ml. This is especially problematic because Lemmy.ml continues to federate information outbound to other kbin instances while refusing to allow inbound communication from them.

Spoofing the user agent is less than ideal, and doesn't respect Lemmy.ml's potential wish to not be contacted by /kbin instances. I don't post this to create division between communities, but I do hope that I can draw awareness to what's going on here. Defederating /kbin instances entirely would even be better than arbitrarily denying access one-way. This said, we should all attempt to maintain a good-faith interpretation until otherwise indicated by the Lemmy developers. It's possibel that this is a firewall misconfiguration or some other webserver-related bug.

Relevant comment from me (#354 - [BUG] Critical errors/failed messages during messenger:consume)

Edits:

Yes, people have already tried reaching out to the Lemmy instance admins in their Matrix room with no answer.
Someone has posed a question on Lemmy.ml about the block here: https://lemmy.ml/post/1563840

top 21 comments

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[–] Serosh@kbin.social 3 points 1 year ago (4 children)

This is utterly baffling and goes against the whole idea of the Fediverse. To take advantage of the impending mass migration, just days before Reddit shuts down their universal API access for good, this all leaves a very bad taste in my mouth.

So users now have to choose between two already-smaller communities when making the transition? This is only going to make a semi-complicated process even more confusing, and end up pushing users back to Reddit.

I had mostly used Lemmy.ml up to this point, but I didn’t leave Reddit to join another u/spez dictatorship. What a disappointing turn of events. Kbin is now my primary.

[–] hugz@kbin.social 2 points 1 year ago

Decentralisation means a clash of egos

[–] Rottcodd@kbin.social 1 points 1 year ago (1 children)

goes against the whole idea of the Fediverse.

Presuming for the sake of argument that it's a deliberate move by .ml to freeze out kbin users, it only really goes against the idea of the fediverse in that it's an underhanded way to accomplish something that was meant to be done openly. By design, every instance is entirely free to choose whether or not to federate with any other.

What a disappointing turn of events. Kbin is now my primary.

And (again presuming for the sake of argument that it's not simply a glitch), that's the fediverse working exactly as intended. Just as every instance is free to choose which instances to federate with, every user is free to choose which instances to join or follow.

[–] DreamerOfImprobableDreams@kbin.social 1 points 1 year ago (1 children)

True, but the original intent was that defederation would be a nuclear option, reserved only for instances that totally failed to moderate stuff like hate speech, bot activity, etc-- given that it damages the Fediverse as a whole.

The lemmy.ml admins are free to federate or defederate from other instances as they please-- and we're free to criticize their decision as we please, too.

[–] Bobo_Palermo@kbin.social 0 points 1 year ago (1 children)

We should not be moderating hate speech....that is a slippery slope. Simply disregard it.

[–] ChemicalRascal@kbin.social 1 points 1 year ago

Something something, that's how you get a Nazi bar.

[–] kabe@lemmy.world 0 points 1 year ago* (last edited 1 year ago) (1 children)

No need to get on the high horse just yet. This is much more likely to be a sever/sync issue than some kind of shadowy conspiracy.

If lemmy.ml wanted to defederate, they'd just go ahead and do it.

[–] BraveSirZaphod@kbin.social 1 points 1 year ago

I'm not sure how much you know about networking or HTTP, but from the evidence posted, this very much is not the kind of thing that just accidentally happens.

[–] Texas_Hangover@lemmy.world 0 points 1 year ago (1 children)

The admins of lemmy.ml are literal commie scum. No surprise that they are a tad authoritarian.

[–] ChemicalRascal@kbin.social 1 points 1 year ago

They're Tankies. Don't confuse Tankies and communists, even if there's a certain historical adjacency there. They are ultimately different concepts.

[–] Cloudless@kbin.social 0 points 1 year ago (1 children)

I am happy to see nothing from the tankies.

[–] HeartyBeast@kbin.social 1 points 1 year ago (1 children)

So block the instances you want to block

[–] assbutt@kbin.social 0 points 1 year ago

How? I'd love to block some instances, but nobody ever fucking explains how.

[–] Onii-Chan@kbin.social 0 points 1 year ago (1 children)

Lemmy.ml is a hive of authoritarians. I'll be glad to not have to see their oppressive fascist fantasies here.

[–] ReCursing@kbin.social 1 points 1 year ago (1 children)

From what I hear, they're authoritarian communist, not fascist. Fascism is not just a synonym for authoritarianism, it's a specific economically far right authoritarian political position.

[–] Onii-Chan@kbin.social 0 points 1 year ago (1 children)

Same end result; oppression of the masses, rejection of human rights and personal liberties, concentration of power and corruption. Fascist, authoritarian communist, tomato, tomAto, as far as I'm concerned. Their ideologies all stand directly on the throat of freedom and I want nothing to do with anyone who believes total control of the people is a positive thing.

[–] Machinist3359@kbin.social 2 points 1 year ago (1 children)

The distinction between a square and a rectangle is important, even if you don't like right angles and parallel sides. Fascism is a flavor of authoritarianism which is uniquely worse and focused on genocide.

[–] Colombo@kbin.social 0 points 1 year ago (1 children)

Fascism is not focused on Genocide. Even for Nazism, Genocide is only a (welcomed) byproduct.

[–] !deleted233369@kbin.social 0 points 1 year ago (1 children)

It's just a coincidence that all fascist governments end up genociding the shit out of one group or another, right?

[–] argv_minus_one@beehaw.org 0 points 1 year ago* (last edited 1 year ago) (1 children)

So do communist governments (e.g. Holodomor, Uyghurs in China). So do capitalist governments (e.g. Native Americans, Irish). Genocide is not unique to fascism, unfortunately.

[–] Machinist3359@kbin.social 1 points 1 year ago

Not unique, but uniquely central. Fascism cannot exist without a persecuted outgroup. In other contexts, genocide is generally a state consolidating power or resources, but not the focus of these state projects.