@Vasilache Since your old router was provided by your ISP, this is hard coded into device's FW. You should contact your ISP and ask them if you can use the new one and what username you should set if...

@BalintN I just realized what you've meant and as far as I used this feature it was working properly. I agree that regardless of a device been connected or not, it should be listed on the Address...

@SEAL Make sure that the 2.4 GHz network is enabled and Hide SSID is not enabled: If the issue persists reset to factory defaults - method 1 and re-configure the router from scratch. If the issue...

@Spocki990 Since you already have a Zyxel main router you should configure the C80 or the Deco in AP mode to avoid the double NAT in your network. Here's (case 1) how to do that for Archer C80....

@D.R.B I presume you're with the EU region FW version - you can determine that from the bottom sticker. Here you can find the latest FW release for your device.

@MIOT It seems that this would be the case - VR600 v2 supports Printer Sharing, while VR600 v3 doesn't - you can see that by the devices' user guide.