I have two TL-WA1201 devices as part of my network.

They are configured as plain access points, i.e. all the regular network management (including DHCP) is performed by other systems in the network.

Both have fixed IP addresses provided by the DHCP server *). These addresses lie in the same /24 network as the addresses of all WiFi clients, as from the DHCP server's point of view, they are connected to the same VLAN there.

When I attempt to perform "severe" administration tasks (configuration backup, firmware upgrade), I always get a message box "This operation is not allowed for remote management". I assume the firmware accidentally believes I were connecting from a WiFi device, yet I'm actually connecting from my regular workstation through ethernet. (The workstation doesn't have direct WiFi access anyway.)

*) The same behaviour if I establish a fixed IP address inside the access points. However, as there is no way to provide a DNS setup in that case, I rather picked the option to fix the IP addresses inside the DHCP setup, and have the APs run as DHCP clients.

I noticed there's a more recent firmware available, but as I cannot (easily) perform a firmware upgrade, I would only attempt the upgrade if someone can tell me this problem is no longer present in the current firmware version.