It is doing DNS Proxy - it issues its own IP address as the DNS server for DHCP clients so it is accepting DNS requests and passing them on to the upstream DNS servers. However there is no config and...

@Hank21 I have Windows and Android WiFi clients on my network. All are affected by this issue. Speed tests I have mentioned have been run from a Windows 11 laptop.

@Hank21 I have done as you suggested. Disabled 6 MHz on the SSID Set the authentication to WPA2-PSK/AES This switches PMF to disabled. Then upgraded the EAP235-wall to 3.2.2 Then rebooted the...

@Hank21 I don't think I mentioned this, but perhaps relevant - a wired client connected through one of the ethernet ports on the EAP is not affected, which suggests an issue limited to the WiFi...

@Hank21 I tried upgrading the EAP to 3.2.2 then forgetting it from the controller and re-adopting. The result is the same - unusable network for wireless clients. 3.1.1 good. 3.2.2 bad.

@Hank21 Contoller is OC200 v1.0 running firmware version 1.29.4 Build 20240304 Rel.54362 and Controller version 5.13.30.20. Here is a shot of the SSID settings Advanced Settings - nothing fancy going...