Hi,

I don't think QOS is broken.
You are running a firewall to support hundreds of users, so the firewall should be able to handle all this.
Cause of this QOS is used, to make sure everyone is able to use the service the astaro is providing. Please repeat your test with hundreds of users downloading at the same time.

I think it is good that Astaro QOS safes bandwith so your smtp is working your proxy is able to talk to the content filter server your DNS is able to get his answers and so on.

Sven

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Astaro preferred Partner, ACE V7