I have Sophos UTM with an Internet Speed of 200mbps bridged mode by ISP.
But my wireless AP15 doesn't have the same speed. I only get 10mbps max.
Are you testing with a wireless network that's "Bridge to AP LAN"? "Separate Zone" networks can have MTU mismatches that slow things down.
Cheers - Bob
Wireless Network Bridge to AP Lan. I also tried 1450 MTU and 1280 MTU.
There's a slight difference in speed but still not parallel with my 200mbps bandwidth.
In Interfaces & Routing>Interfaces>Hardware
What does the "link mode" say? Is auto negotiation: on or off?
Is Intrusion Protection on or off? Maybe too many rules could be slowing your traffic.