this post was submitted on 20 Jun 2023
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Admins, we're about to have a really bad SPAM problem when Lemmy removes captcha support in v.0.18 - You ALL have a responsibility to communicate back to lemmy devs to try to stop it. (tucson.social)
submitted 1 year ago* (last edited 1 year ago) by th3raid0r@tucson.social to c/technology@beehaw.org
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Look, we can debate the proper and private way to do Captchas all day, but if we remove the existing implementation we will be plunged into a world of hurt.

I run tucson.social - a tiny instance with barely any users and I find myself really ticked off at other Admin's abdication of duty when it comes to engaging with the developers.

For all the Fediverse discussion on this, where are the github issue comments? Where is our attempt to convince the devs in this.

No, seriously WHERE ARE THEY?

Oh, you think that just because an "Issue" exists to bring back Captchas is the best you can do?

NO it is not the best we can do, we need to be applying some pressure to the developers here and that requires EVERYONE to do their part.

The Devs can't make Lemmy an awesome place for us if us admins refuse to meaningfully engage with the project and provide feedback on crucial things like this.

So are you an admin? If so, we need more comments here: https://github.com/LemmyNet/lemmy/issues/3200

We need to make it VERY clear that Captcha is required before v0.18's release. Not after when we'll all be scrambling...

EDIT: To be clear I'm talking to all instance admins, not just Beehaw's.

UPDATE: Our voices were heard! https://github.com/LemmyNet/lemmy/issues/3200#issuecomment-1600505757

The important part was that this was a decision to re-implement the old (if imperfect) solution in time for the upcoming release. mCaptcha and better techs are indeed the better solution, but at least we won't make ourselves more vulnerable at this critical juncture.

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[–] DrWeevilJammer@lm.rdbt.no 12 points 1 year ago

Someone has already submitted a PR with the changes the dev recommended. The captcha stuff is in a new db table instead of in-memory at the websocket server.

However, from one of the devs:

One note, is that captchas (and all signup blocking methods) being optional, it still won't prevent people from creating bot-only instances. The only effective way being to block them, or switch to allow-only federation.

Once people discover the lemmy-bots that have been made that can bypass the previous captcha method, it also won't help (unless a new captcha method like the suggested ones above are implemented).

The root of the issue seems to be that they've removed websockets, for the following reasons:

Huge burden to maintain, both on the server and in lemmy-ui. Possible memory leaks. Not scalable.

I can understand them wanting to make their lives a bit easier (see "huge burden to maintain) - Lemmy has exploded recently (see "not scalable") and there are far bigger issues to fix, and an even larger number of bad actors (see "possible memory leaks") who have learned about Lemmy at the same time as everyone else and want to exploit or break it.