@A_WiFi_Station DHCP option is set on DHCP server, if it ISP router you have to talk to the ISP provider about that. so Omada discovery utility is the fasted if you don't have a DHCP server you...

@A_WiFi_Station Ok so the ap is adopted to 149.28.138.67 from the beginning. not a controller LAN IP? It look like that the ap is losing the information about the controller. I suggest you to add...

@A_WiFi_Station Ok, thanks, I do a test to all your ports and this is not the problem. have disconected ap worked from remote site before? or do you adopt the ap on LAN where controller is and moved...

@A_WiFi_Station That realy dont answer my question, ok, Ports in what, is this port in your firewall or in ubuntu where ontroller is installed? And how is the remote ap connected to the controller?...

@A_WiFi_Station Need more information. firmware version, how is ap conneted to controller and so on. do you use port nat or vpn to controller, what port are opened..

@DREEMus I see you are using Firmware Version: 2.2.0, this was probably withdrawn due to errors similar to the one you have. try and install Early Access Firmware Version: 2.1.4 which will replace...