@Ksal00 Login your RE web management interface at http://tplinkrepeater.net and check its connection status: If necessary re-configure the RE to restore its connection to your main router - use this...

@MunshifamHow_1 Contact your local support or your retailer if the RE is under warranty with this issue.

@DJDAN You can't open all ports at once - you can use a DMZ to your PC IP address but that's risky in terms of your network security. Follow this guide on how to open the ports one by one. For DMZ...

@BabyPower Update your RE firmware to the latest release - TL-WA850RE(EU)_V7_1.0.13 Build 231115. After a successful update reboot the main router then reboot the RE. If the issue persists follow...

@Ddluckydd Most probably your modem router is with customized FW release specifically for Dimensione ISP. If that's the case the default credentials (admin/admin) won't work - contact Dimensione for...

@DJDAN Here: Just make sure that you have your public IP address on the Internet port of your VR2100 (otherwise this won't work for you):