Restrict dangerous file types in Talk

ℹ️ Support
1

Hello Community.
We would like to block dangerous file types like .dll or .exe from being dragged into or transferred via Talk. We looked at the ‘File Access Control’ application but this is to restrict application extensions across NextCloud Files.

Can we set a filter or is there a way to restrict these files from Talk only?

This is possible in MS Teams as seen in this link: https://m365admin.handsontek.net/new-file-protection-teams-chat-channels-blocks-unsafe-content/

Many Thanks

2

@whats.next welcome to the Nextcloud-community forum where volounteers try to help everyone ;o)

there once has been an app called ransomewareprotection which might have been of help. but it remains unsupported since v25.

So all I can come up with it a kind of workaround, only since I don’t know any direct way to block specific uploads.

  • you could tell your virusscanner to delete all .dll oder .exe files in the talk-directory immediately
  • you can use the rename-app to immediately rename all of your considered dangerous files to some random extension… like e.g. “.dll” to like “.dll-careful” or something
  • you maybe could use the agree-app to make it mandatory to get an OK from someone to use/copy/move those files

That’s all for the moment. It’s more like a brainstorm-suggestion. I didn’t really testdrive any of those things.
so just be creative yourself and let us know how you solved this situation…

Or maybe there are some additional suggestions

3

Talk shares are more or less normal shares in Nextcloud. You can prevent extension with access control, as you mentioned or with config entries. But restrict it in talk, while allowing it in Nextcloud is not possible.