@DavideDiemme to see if device management is supported on your devices see here

@DavideDiemme I dont understand the language, but if it Device Management your device problably not support this.

@DavideDiemme of course you lose connection with the controller when you change the public ip on the controller, how should the remote device find the controller do you think? you can use dns name...

@Allianztech you cannot have the same ip network on WAN and LAN, but this should be easy to solve, change the ip on the ISP router to something else, then set the ip on the ER605 to what was on the...

@Sym and the solution was ?

@Sym To me, it seems that there are problems with the configuration of vlan on the pfsence router. you should check that it is in order, I can't help you there, double check the router configuration....