QoS Sophos XG

I found the solution and I'm sharing it with you.

everything I did in configuration was correct.

but QoS cannot affect the active sessions. That is, before I created a firewall rule with QoS, another firewall rule was active there, with which the traffic was matched. After that I created a new firewall rule with limited QoS. Although the sessions were matched with the new firewall rule, but still QoS didn't work.
Therefore, after creating the new firewall rule with QoS, I terminated all active sessions between the source and destination address(es).
The commands I used:
first login via SSH.
# conntrack -L | grep "orig-dst=10.1.10.2" (example IP of target server) - confirm active sessions. "L" stands for List
# conntrack -D -d 10.1.10.2 - explicitly deletes all sessions towards target address. "D" stands for "Delete conntrack or expectation" and "d" for destination address.

After that, QoS was working properly.
I recommend that when you do QoS setting, please pay attention to the active sessions between source and destination and kill them after creating firewall rules.

Hi Farzan,

Thank you for sharing the solution.

Hi Farzan,

Thank you for sharing the solution.