Omada hardware controller does not manage er605 router correctly during update
I have 4 gateways (sites) in my Omada OC200 1.0 controller. On these remote locations, ER605 v2.0 routers, all connected to VPN, are managed in my controller.
Everything works perfectly. The controller reports that some routers ER605 v2.0 need an update! When running on the controller, the routers are triggered online, but after a while the error message appears: Failed to upgrade Router_..... to firmware version 2.2.2 Build 20231017 Rel. 68869 online. Please check your network configuration and make sure the device can access the Controller's HTTPS management port.
Which ports must be taken into account within the network when using a VPN connection?