Adding a room ACL that denies a server does not prevent typing notifications

[Cknight70]

Description

Hi, I have a user who hosts his own dendrite server who I have banned from a room. He however has been sending typing notifications to my room for the last 13 hours to annoy my users. I have tried sending an acl that denies his server from communicating, but that has not prevented his typing notifications.

Unfortunately, I do not know how he has been sending these typing notifications.

I would expect sending a room acl to deny a server would prevent users from sending typing notifications.

Here is the acl

Version information

If not matrix.org:

• Version: 1.47.1

• python_version: 3.9.2

• Install method: Official Debian package

• Platform: apt

Running on Debian 11 (Bullseye)

[babolivier]

Thanks for the report! FWIW it doesn't look like we're applying room ACLs to any EDU coming over federation. More investigation needed to figure out whether this is a spec issue or a bug in Synapse's implem (but I assume it's the latter).

[clokep]

More investigation needed to figure out whether this is a spec issue

Sounds like this is a spec issue, the server-server spec is very specific on when ACLs are applied.