What happens when there are multiple routers with UPNP in a LAN?
1. Each router opens UPNP (or even creates port forwards) only for the devices connected to this router OR do we have to port forward the same port at each router?
2. Can we have the UPNP function enabled at all routers, OR we must have only one UPNP in one router (like the DHCP Server?). In the latter case, does it matter at which router we must have the UPNP on?
1. Each router opens UPNP (or even creates port forwards) only for the devices connected to this router OR do we have to port forward the same port at each router?
2. Can we have the UPNP function enabled at all routers, OR we must have only one UPNP in one router (like the DHCP Server?). In the latter case, does it matter at which router we must have the UPNP on?