Access restrictions My router has been configured to allow only three devices to login to its management console (Web UI): my PC, laptop, and mobile phone. The router uses the devices' IP addresses as the access filter (essentially, a "white list" of permitted devices/IPs). This means those devices' IPs must not change when they join the network (the router's DHCP server may do that automatically). If a device's IP changes, that device will not be allowed to login to the management console ...