..:: tchncs ::..

Is it possible to block a community on system level? i.e. !random@kbin.social is a massive nswf spam sink of hundreds kbin.social local accounts. Or should we rather remove/purge it entirely?

As of deep last light (cest), the error was identified and tchncs started to inform other servers about the events they were missing out on. It wasn't processing one of the outgoing queues correctly due to a well hidden typo in a configfile – causing one of the federation senders not identifying itself correctly.

You may run into a few recent messages that can't be decrypted, but otherwise everything federation related should be back to normal.

Sorry about this mess and thanks to everybody who has helped in identifying the issue.

Well hello again, I have just learned that the host that recently had both nvme drives fail upon drive replacement, now has new problems: the filesystem report permanent data errors affecting the database of both, Matrix server and Telegram bridge.

I have just rented a new machine and am about to restore the database snapshot of the 26. of july, just in case. All the troubleshooting the recent days was very exhausting, however, i will try to do or at least prepare this within the upcoming hours.

!

Update

After a rescan the errors have gone away, however the drives logged errors too. It's now the question as to whether the data integrety should be trusted.

Status august 1st

Well ... good question... optimizations have been made last night, the restore was successful and ... we are back to debugging outgoing federation :( **** The new hardware also will be a bit more powerful... and yes, i have not forgotten that i wanted to update that database. It's just that i was busy debugging federation problems.

References

• federation issues after restore: https://github.com/matrix-org/synapse/issues/16025
• why we had to restore initially: https://text.tchncs.de/tchncs/about-the-matrix-incident-on-july-26-2023

Just in case we have people here who could not see the infobox on the statuspage due to adblockers :)

Crossgeposted von: https://lemmy.ml/post/2540925

> cross-posted from: https://lemmy.ml/post/2540874 > > > ## What is Lemmy? > > > > Lemmy is a self-hosted social link aggregation and discussion platform. It is completely free and open, and not controlled by any company. This means that there is no advertising, tracking, or secret algorithms. Content is organized into communities, so it is easy to subscribe to topics that you are interested in, and ignore others. Voting is used to bring the most interesting items to the top. > > > > ## Major Changes > > > > This version brings major optimizations to the database queries, which significantly reduces CPU usage. There is also a change to the way federation activities are stored, which reduces database size by around 80%. Special thanks to @phiresky for their work on DB optimizations. > > > > The federation code now includes a check for dead instances which is used when sending activities. This helps to reduce the amount of outgoing POST requests, and also reduce server load. > > > > In terms of security, Lemmy now performs HTML sanitization on all messages which are submitted through the API or received via federation. Together with the tightened content-security-policy from 0.18.2, cross-site scripting attacks are now much more difficult. > > > > Other than that, there are numerous bug fixes and minor enhancements. > > > > ## Support development > > > > @dessalines and @nutomic are working full-time on Lemmy to integrate community contributions, fix bugs, optimize performance and much more. This work is funded exclusively through donations. > > > > If you like using Lemmy, and want to make sure that we will always be available to work full time building it, consider donating to support its development. No one likes recurring donations, but they’ve proven to be the only way that open-source software like Lemmy can stay independent and alive. > > > > - Liberapay (preferred option) > > - Open Collective > > - Patreon > > - Cryptocurrency (scroll to bottom of page) > > > > ## Upgrade instructions > > > > Follow the upgrade instructions for ansible or docker. There are no config or API changes with this release. > > > > This upgrade takes ~5 minutes for the database migrations to complete. > > > > You may need to run sudo chown 1000:1000 lemmy.hjson if you have any permissions errors. > > > > If you need help with the upgrade, you can ask in our support forum or on the Matrix Chat. > >

Für deine/eure klasse Arbeit hier!

Hoffe, du/ihr habt die Nacht gut überstanden. ;-)

Mit meiner neuen 'F-Droid' App auf Android 'Thunder' für Lemmy, klappt es hier besonders gut. 😃

see also https://status.tchncs.de/status/tchncs

Erwähnung von tchncs.de auf Golem (3. Seite)!

All of a sudden mentioning an ActivityPub e.g. Mastodon group does not create its Lemmy community posting anymore, see https://social.tchncs.de/@erAck/110758480657084086 That worked before..

Hi there! Last time I posted here, my problem was solved quickly so I'll try one more time. :)

I would like to migrate/mirror one of my reddit subs on here including a lot if not all posts. This would mean the following things in excalating order:

• Make a bot crosspost every new post on the sub
• Copy seed content (like 50 or 100 posts?)
• Copy the entire sub history

I have read that this can strain an instance (at least the last one I suppose) and I would like to know if it is ok to do so and if I need any help from someone with high permissions. Optimally, I'd do point three but 1 or 2 would be good as well.

Have a good one! :)

Hi there! Not sure if this is the right place to ask but I tried to upload an icon and a banner to a community I recently made. It's throwing this error: {"data":{"msg":"Error interacting with filesystem","files":null},"state":"success"} both on firefox and chrome. I filed an issue on github with the frontend but I thought maybe it's just me making an error that is known here. Mods: Feel free to delete if this is the wrong place to post.

Have a great day! :)

Werden eigentlich Downvotes federiert, oder stammen alle Downvotes, die ich sehe, von der Instanz hier?

This instance was updated a little while ago.

You might have heard of the recent security incident on some instances – that specific xss fix had been added to this instance in advance. However, there are no custom emojis yet, which was the source of that incident. But .... I'll likely add some soon. :)

Creating a community also creates a corresponding ActivityPub Group, like for example for !libreoffice there's also @libreoffice@discuss.tchncs.de. But, its description stays whatever was entered first for the community and doesn't get updated on changes. Any way to force that?

Is this also fixed on tchncs? Beehaw went offline to fix it, so I assume this is pretty important.

BTW thank you for hosting this instance!

If not, then it is time to do it now, before it is too late.

Crossgeposted von: https://lemmy.ml/post/1808829

> ## What is Lemmy? > > Lemmy is a self-hosted social link aggregation and discussion platform. It is completely free and open, and not controlled by any company. This means that there is no advertising, tracking, or secret algorithms. Content is organized into communities, so it is easy to subscribe to topics that you are interested in, and ignore others. Voting is used to bring the most interesting items to the top. > > ## Major Changes > > This release includes major improvements to performance, specifically optimizations of database queries. Special thanks to @phiresky, @ruud, @sunaurus and many others for investigating these. Additionally this version includes a fix for another cross-site scripting vulnerability. For these reasons instance admins should upgrade as soon as possible. > > As promised, captchas are supported again. And as usual there are countless bug fixes and minor improvements, many of them contributed by community members. > > ## Upgrade instructions > > Follow the upgrade instructions for ansible or docker. > > If you need help with the upgrade, you can ask in our support forum or on the Matrix Chat. > > ## Support development > > We (@dessalines and @nutomic) have been working full-time on Lemmy for almost three years. This is largely thanks to support from NLnet foundation. > > If you like using Lemmy, and want to make sure that we will always be available to work full time building it, consider donating to support its development. No one likes recurring donations, but they've proven to be the only way that open-source software like Lemmy can stay independent and alive.

Has this instance already blocked threads ? If not, is there any appetite for that ?

I suspect that this will be an important consideration for many users choice-of-instance in the future.

Die aktuellen Erfahrungen der Lemmy Instanz Lemmy.world mit dem RC10 der 18.1 sehen sehr vielversprechend bezüglich der Serverauslastung aus.

Lemmy.world status update 2023-07-05

cross-posted from: https://lemmy.world/post/1061471

> Another day, another update. > > More troubleshooting was done today. What did we do: > > - Yesterday evening @phiresky@phiresky@lemmy.world did some SQL troubleshooting with some of the lemmy.world admins. After that, phiresky submitted some PRs to github. > - @cetra3@lemmy.ml created a docker image containing 3PR's: Disable retry queue, Get follower Inbox Fix, Admin Index Fix > - We started using this image, and saw a big drop in CPU usage and disk load. > - We saw thousands of errors per minute in the nginx log for old clients trying to access the websockets (which were removed in 0.18), so we added a return 404 in nginx conf for /api/v3/ws. > - We updated lemmy-ui from RC7 to RC10 which fixed a lot, among which the issue with replying to DMs > - We found that the many 502-errors were caused by an issue in Lemmy/markdown-it.actix or whatever, causing nginx to temporarily mark an upstream to be dead. As a workaround we can either 1.) Only use 1 container or 2.) set proxy_next_upstream timeout; max_fails=5 in nginx. > > Currently we're running with 1 lemmy container, so the 502-errors are completely gone so far, and because of the fixes in the Lemmy code everything seems to be running smooth. If needed we could spin up a second lemmy container using the proxy_next_upstream timeout; max_fails=5 workaround but for now it seems to hold with 1. > > Thanks to @phiresky@lemmy.world , @cetra3@lemmy.ml , @stanford@discuss.as200950.com, @db0@lemmy.dbzer0.com , @jelloeater85@lemmy.world , @TragicNotCute@lemmy.world for their help! > > And not to forget, thanks to @nutomic@lemmy.ml and @dessalines@lemmy.ml for their continuing hard work on Lemmy! > > And thank you all for your patience, we'll keep working on it! > > Oh, and as bonus, an image (thanks Phiresky!) of the change in bandwidth after implementing the new Lemmy docker image with the PRs. > > ! > > Edit So as soon as the US folks wake up (hi!) we seem to need the second Lemmy container for performance. So that's now started, and I noticed the proxy_next_upstream timeout setting didn't work (or I didn't set it properly) so I used max_fails=5 for each upstream, that does actually work.

I am not familiar with the legal situation this instance's server and owner is in, are there any actions a user could take that could expose the operators to legal liability? Could the instance face problems if someone posts a link to pirated content? What about general discussion of piracy? Or any other possibly legally problematic content?

At the moment I don't have the means to provide financial support but still wanted to say thank you for providing this instance, a place for those wanting to join the fediverse but not wanting to join the major instances. Once I have the financial means again I'll definitely consider supporting!

Thank you for your commitment..

"Beim nächsten Cryptocafe am 19.07.2023 um 19 Uhr in der Alten Mu (Raum C20) starten wir mit einem Vortrag von Ulf zum Thema: "Angriffe mit generativer KI"

Ihr seid herzlich eingeladen!"

Hört sich interessant an, ich werde versuchen, da zu sein...

cross-posted from: https://lemmy.world/post/465785

> # Android > > * ##### ! Jerboa Official Android client. > * Currently latest version (v0.0.35) works only with v0.18 Lemmy instances. Download v0.0.34 from Github releases until instances switch to new Lemmy > * Community: !jerboa@lemmy.ml > * Github: link > * Google play: link > > --- > > * ##### ! Thunder app > * Community: !thunder_app@lemmy.world > * Github: link > > --- > > * ##### ! Liftoff > * Community: !liftoff@lemmy.world > * Github: link > * Playstore: link > > --- > > * ##### ! Summit > * Community !summit@lemmy.world > * Google play: link > > --- > > * ##### ! Connect for Lemmy > * Community !lemmyconnect@lemmy.ca > * Google play: link > > --- > > * ##### ! Sync for Lemmy (Announced) > * Community: !syncforlemmy@lemmy.world > > --- > > * ##### ! Lemming > * Community: !lemming_app@lemmy.world > * Github link > > --- > * ##### ! Lemmotif > * Community: !lemmotif@lemmy.world > * Playstore: link > --- > > * ##### ! Artemis (Announced) > * Community: !ArtemisApp@kbin.social > > --- > > * ##### Lemmy Fennec > * Github: link > > --- > > * ##### Beyond (No release yet) > * Community: https://lemmy.world/post/355285 > > --- > > * ##### Warami (No release yet) > * Github: link > > --- > > * ##### ! Slide for Lemmy (Announced) > * Community: !slide@feddit.uk > > --- > > * ##### ! Lemmur (Abandoned) > * Github: link > > --- > --- > > # IOS > > * ##### ! Memmy for IOS > * Community: !memmy@lemmy.ml > * Github: link > * Testflight: link > > --- > > * ##### ! Thunder app > * Community: !thunder_app@lemmy.world > * Github: link > * Testflight: link > > --- > > * ##### ! Mlemapp > * Community: !mlemapp@lemmy.ml > * Github: link > * Testflight: link > > --- > > * ##### ! Liftoff > * Community: !liftoff@lemmy.world > * Github: link > * Testflight: link > > --- > > * ##### ! Olympus > * Community !olympusapp@sh.itjust.works > * Testflight link > --- > > * ##### ! Artemis (Announced) > * Community: !ArtemisApp@kbin.social > > --- > > * ##### ! Cavy (No development?) > * Github: link > > --- > > * ##### Ares (No release yet) > * Github: link > > --- > > * ##### Beyond (No release yet) > * Community: https://lemmy.world/post/355285 > > --- > > * ##### Morpha > * Community: !morpha@vlemmy.net > * Github: link > > --- > --- > > # Linux > > * ##### ! Lemoa GTK client > * Github: link > > --- > > * ##### ! Liftoff > * Community: !liftoff@lemmy.world > * Github: link > > --- > > * ##### ! Lemonade GTK4 client > * Github: link > > --- > > * ##### ! NeonModem > * Website: link > * Github: link > > --- > --- > > # Windows > > * ##### ! Liftoff > * Community: !liftoff@lemmy.world > * Github: link > > --- > > # MacOS > > * ##### ! Liftoff > * Community: !liftoff@lemmy.world > * Github: link > * Testflight: link > > --- > --- > > # Web based > > * ##### ! Slemmy > * Github: link > * Website: https://slemmy.libdb.so/ > > --- > > * ##### ! Wefwef > * Github: link > * Website: https://wefwef.app > > --- > > * ##### ! Createlab > * Github: link > * Website: https://createlab.io/ > > --- > > * ##### sx-lemmy > * Github: link > * Website: https://sx-lemmy.vercel.app/ > > --- > --- > > # Browser extensions > > * ##### ! Mullem > * Firefox addon: link >

LibreOffice is a free and open source office suite, used by millions around the world.

Join the LibreOffice community!

The search result link is on purpose. That way when you enter the community you will fetch it from your instance.

If you're using an app that doesn't understand this or it doesn't work for other reasons, here's the direct link.

Crossgeposted von: https://feddit.de/post/1261307

> ... X wie Xanten oder Z wie Zwickau könnte theoretisch auch noch kommen. Gibt es aber m.W. noch nicht. > > Hier ein kleiner Überblick zu welchen Städten es bereits Communitys gibt: > - Aachen > - Augsburg > - Berlin > - Bielefeld > - Bonn > - Burghausen > - Bremen (auf feddit) > - Bremen (auf discuss.tchncs) > - Chemnitz > - Darmstadt > - Dortmund > - Dresden > - Düsseldorf > - Frankfurt am Main > - Hamburg (auf Feddit) > - Hamburg (auf discuss.tchncs) > - Hamm > - Hannover > - Heidelberg > - Kassel > - Kiel > - Köln > - Leipzig > - Lübeck > - Mainz > - Mannheim > - Münster > - München > - Nürnberg > - Oldenburg > - Osnabrück > - Stuttgart > - Tübingen > - Wuppertal > > Außerdem Regionen: > - Bodensee > - Eifel > > Falls welche vergessen wurden bzw. wenn neue eröffnet werden (auch auf anderen Instanzen oder auf kbin), gerne ergänzen, danke!

This post has 11 comments on lemmy.world right now

https://lemmy.world/post/788282

but I can only see 2 of them when I'm browsing from tchncs

https://discuss.tchncs.de/post/368066

Upvotes are also different. Is there something broken in the federation with lemmy.world?

Update: It looks like it stopped federating right after I commented on the post.

Update 2: It's not only lemmy.world. One of my posts in a community on feddit.de never showed up there.

Update 3: feddit and lemmyworld are still on 0.17.4, while tchncs is on 0.18.0

Hi, würde gerne die Bilder, die ich hier bei pixel.tchncs.de hochlade auch in Lemmy (per Hotlink) teilen. Ist das möglich bzw. erlaubt? Andernfalls lade ich sie beim Hoster meines Vertrauens hoch und verlinke sie von dort.

Danke! 😊

As far as I see that instance is a far-right cess pool. Everything I've got from that instance were low-quality transphobic "news articles".

I'm only noticing this on tchncs.

The couple first posts on the "Hot" "Subscribed/All" sorts on tchncs seem to be "normal" hot posts, but after around 15 of those there are only weeks/months/years old posts.

!

I searched for issues on the repo and I found this which may have been applicable: https://github.com/LemmyNet/lemmy/issues/3125

However, it was fixed for 0.18, which tchncs is running, and theoretically update_hot_ranks should be a startup job, which I assume happened when updating.

Can something be done about this? Maybe cross-post this to lemmy_support@lemmy.ml (though this should probably be done by our friendly admin)?

cross-posted from: https://beehaw.org/post/697402

> More up to date and more detailed information at: https://beehaw.org/post/683217 > > cross-posted from: https://kbin.social/m/kbinMeta/t/71764 > > > The amount of apps being developed for iOS / Android is getting really crazy now and new apps keep popping up every day. Updated list below: > > > > * Artemis (iOS, Android, kbin, lemmy): link > > * Memmy (iOS, lemmy): link > > * Mlem (iOS, lemmy): link > > * Morpha (iOS, lemmy): link > > * Thunder (iOS, Android, lemmy): link > > * Beyond (iOS, Android, lemmy): link > > * Limbo (iOS, Android, lemmy): link > > * Jerboa (Android, lemmy): link > > * Slide (Android, lemmy): link > > * Sync (Android, lemmy): link > > * Unnamed (kbin): link > > > > Most apps on the list are lemmy apps, meaning they don't work with kbin. Artemis is specifically designed to work with kbin, not sure if or when any of the other ones will go in that direction or become interoperable as there are some challenges with the kbin API at the moment. Having said that, a new API is in the works (https://codeberg.org/Kbin/kbin-core/pulls/357) so things should get better with time. Some of the apps are in very early stage of development so it may happen that they adjust OS availability and platform support. > > See info in table format with more details: > https://beehaw.org/post/697419

Hey there, many of you worried after recent registration bot waves on other instances and now after the temp captcha removal for this Lemmy release. It was fine until now, but it looks like the bored kids with their bots have now found this server. Approval of new signups is now required again. Especially sad as this does not scale well.

> I hope that this game has made you reconsider your views on content moderation. Maybe you will decide to live with the nebulosity, but have more sympathy for the refs. Maybe you will decide that you would prefer to live with the consequences of less moderation. Maybe you will think really hard about decentralization (which is not a panacea). Maybe you will give up on social media altogether.

Crossposted from: https://lemmy.ml/post/1465740

> ## What is Lemmy? > > Lemmy is a self-hosted social link aggregation and discussion platform. It is completely free and open, and not controlled by any company. This means that there is no advertising, tracking, or secret algorithms. Content is organized into communities, so it is easy to subscribe to topics that you are interested in, and ignore others. Voting is used to bring the most interesting items to the top. > > ## Major Changes > > ### HTTP API instead of Websocket > > Until now Lemmy-UI used websocket for all API requests. This has many disadvantages, like making the code harder to maintain, and causing live updates to the site which many users dislike. Most importantly, it requires keeping a connection open between server and client at all times, which causes increased load and makes scaling difficult. That's why we decided to rip out websocket entirely, and switch to HTTP instead. This change was made much more urgent by the sudden influx of new users. @CannotSleep420 and @dessalines have been working hard for the past weeks to implement this change in lemmy-ui. > > HTTP on its own is already more lightweight than websocket. Additionally it also allows for caching of server responses which can decrease load on the database. Here is an experimental nginx config which enables response caching. Note that Lemmy doesn't send any cache-control headers yet, so there is a chance that private data gets cached and served to other users. Test carefully and use at your own risk. > > ### Two-Factor Authentication > > New support for two-factor authentication. Use an app like andOTP or [Authenticator Pro]( > https://f-droid.org/packages/me.jmh.authenticatorpro/) to store a secret for your account. This secret needs to be entered every time you login. It ensures that an attacker can't access your account with the password alone. > > ### Custom Emojis > > Instance admins can add different images as emojis which can be referenced by users when posting. > > ### Other changes > > #### Progressive Web App > > Lemmy's web client can now be installed on browsers that support PWAs, both on desktop and mobile. It will use an instance's icon and name for the app if they are set, making it look like a given instance is an app. > > Note for desktop Firefox users: the desktop version of Firefox does not have built in support for PWAs. If you would like to use a Lemmy instance as a PWA, use use this extension. > > #### Error Pages > > Lemmy's web client now has error pages that include resources to use if the problem persists. This should be much less jarring for users than displaying a white screen with the text "404 error message here". > > #### Route Changes > > Pages that took arguments in the route now take query parameters instead. For example, a link to lemmy.ml's home page with a few options used to look like this: > > > https://lemmy.ml/home/data_type/Post/listing_type/All/sort/Active/page/1 > > > The new route would look like this: > > > https://lemmy.ml?listingType=All > > Note that you now only have to specify parameters you want instead of all of them. > > #### Searchable select redesign > The searchable selects, such as those used on the search page, have a new look and feel. No more inexplicable green selects when using the lightly themes! > > #### Share button > > Posts on the web client now have a share button on supported browsers. This can be used to share posts to other applications quickly and easily. > > #### Lemmy-UI Overall look and feel > > lemmy-ui is now upgraded to bootstrap 5, and every component is now much cleaner. > > Special thanks to sleepless, alectrocute, jsit, and many others for their great work on improving and re-organizing lemmy-ui. > > #### Database optimizations > > Special thanks to johanndt, for suggesting improvements to Lemmy's database queries. Some of these suggestions have already been implemented, and more are on the way. > > Query speed is Lemmy's main performance bottleneck, so we really appreciate any help database experts can provide. > > #### Captchas > > Captchas are not available in this version, as they need to be reimplemented in a different way. They will be back in 0.18.1, so wait with upgrading if you rely on them. > > ## Upgrade instructions > > Follow the upgrade instructions for ansible or docker. > > If you need help with the upgrade, you can ask in our support forum or on the Matrix Chat. > > ## Support development > > We (@dessalines and @nutomic) have been working full-time on Lemmy for almost three years. This is largely thanks to support from NLnet foundation. > > If you like using Lemmy, and want to make sure that we will always be available to work full time building it, consider donating to support its development. No one likes recurring donations, but they've proven to be the only way that open-source software like Lemmy can stay independent and alive. >

Independent services like tchncs are valuable and need money to run stable, so we can enjoy them. Consider donating if you can.

Asking because I remember similar from e.g. Okuna where a shiton of communities were created during the gold rush but many were left unmoderated for months until they eventually ceased.

And at what point would a transfer be considered by staff?

cross-posted from: https://lemmy.ml/post/1445111

> Lemmy is planning on having its 0.18.0 release tomorrow, and this adds compatibility for it.

> We’ve upgraded lemmy.ml to use the new 0.18.0 back-end, so it was crucial that I got this jerboa release out ASAP to be compatible with it.

Eine ganz gute Übersicht mit aktuell in der Entwicklung oder angekündigten Lemmy/Kbin Clients für iOS und Android

Crosslink: https://beehaw.org/post/697402

Yesterday I made a post in the football community located on lemmy.world (https://lemmy.world/c/football). Now when you look at the post from here discuss.tchncs.de/c/football@lemmy.world it has 0 comments and 1 upvote:

https://discuss.tchncs.de/post/183785

Whereas it actually has 1 comment and 4 upvotes on the Remote instance:

https://lemmy.world/post/343210

Because on discuss.tchncs.de the comment doesn’t show up, I obviously get no notification nor can I respond. Anyone got an idea?