@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....

@Sym II don't know anything about pfSense routers, but on TP-Link and Unifi, VLAN1 is always untagged in the background. i'm not really sure but i think you have to have vlan1 untagged to make it...

@JohnGian there is nothing you can do with routing on the ER605, you have to do the routing on the openvpn server, I only have experience with openvpn from pivpn but it might be something of the...