I’m actually concerned that someone might maliciously upload files and fill up my S3 bucket. It would be great if there was a setting to limit the number of uploads or the total file size per user per day.

To directly answer your topic’s title, [image] Restrict uploads Theme component This is a very small theme component that will remove the upload button from the composer toolbar and disable drag-and-drop uploading for users that are under a specified trust level. Illustration [unrestricted] [restricted] Settings [setting] hammer_and_wrench Repository github.com/tshenry/discourse-restrict-uploads open_book New to Discourse Themes? Beginner’s guide to using Discourse Themes Install this theme component Since it’s a theme component, it can be bypassed by users, especially if they can enable the safe mode. That’s a “soft” limitation, sort to speak. It also doesn’t support groups, but that could be asked as a #feature request :slightly_smiling_face:

Max image size KB The maximum image upload size. This must be configured in nginx (client_max_body_size) / apache or proxy as well. Images larger than this and smaller than client_max_body_size will be resized to fit on upload. Max attachment size KB The maximum attachment files upload size. This must be configured in nginx (client_max_body_size) / apache or proxy as well. params: ## Which Git revision should this container use? (default: tests-passed) version: tests-passed ## Maximum upload size (default: 10m) upload_size: 20m I want to know if I can limit the number of upload attempts or the total file size per user per day through that method?

I want to block malicious users, you know, but the component you recommended can only block regular users. :broken_heart:

It’s not possible to set such a limitation without creating a custom plugin. [image] copymonopoly: I’m actually concerned that someone might maliciously upload files and fill up my S3 bucket. Do you suspect it already happened? Did you notice a sudden increase in uploads used space? If not, what makes you think such an exploit could happen?

Maybe it helps to describe your problem more specifically. Which file extensions are allowed on your forum (Authorized extensions site setting)? By default, only images are allowed. Then requiring approval for posts containing images from users with a low trust level could help (Skip review media groups). You can also identify such users in the “Top uploads” report in the admin area.

There isn’t any at the moment, maybe I’m being too pessimistic. However, as you mentioned, even if it’s a plugin, it can be disabled through safe mode. It seems that the only way to prevent it is through server or S3 bucket settings.

Thank you for your advice. However, if it’s a malicious user, can they disguise other files as image formats? And since there are no restrictions on the number or total size of images, can they still upload images without limit? Also, I still don’t understand whether the files will occupy my S3 bucket if they upload successfully but don’t publish a topic.

[image] copymonopoly: However, as you mentioned, even if it’s a plugin, it can be disabled through safe mode. Only the front-end functionality of plugins is disabled in safe mode. The backend limitations remain. You can also disable safe mode for users.

[image] copymonopoly: There isn’t any at the moment, maybe I’m being too pessimistic. You can imagine thousands of ways of disrupting any software in which you can add data, so I wouldn’t worry about this imaginary problem and focus my attention on other things :stuck_out_tongue:

[image] copymonopoly: Also, I still don’t understand whether the files will occupy my S3 bucket if they upload successfully but don’t publish a topic. Here’s some documentation regarding that. [image]Cleaning up uploads and purging uploads from S3 Purging S3 uploads Cleaning up orphan and deleted uploads works similarly for both local and S3 storages. The only difference between the local storage and S3 storages is that the cleanup of the S3 uploads is automatically handled by S3 via a tombstone policy. See Managing your storage lifecycle for additional details about how this is handled on S3.

How to ban TL1 or other groups to attach attachments in topics?

Product Support

Heliosurge (Dan DeMontmorency) January 8, 2025, 10:19pm 16

Regarding safe-mode.

Topic		Replies	Views
Why is my upload limit 100mb?It's set to 500mb Product Support	56	4192	October 11, 2023
Limit file uploads by trust level Feature	4	1073	January 1, 2019
Can I increase the 1024000 kb limit on attachment? Self-hosting	18	1805	August 19, 2021
Limit number of images uploaded by user per day, wil TL multipliers Feature	26	4297	April 4, 2018
More flexible upload options for admin? Feature	6	1299	May 30, 2019

How to ban TL1 or other groups to attach attachments in topics?

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