@SajibChowdhury 

Hi, thanks for posting question here.

TP-Link Archer Router has a remote management feature that allows you to access your Router web interface when you are away from home.

In order to manage your router remotely, please log in to the web management interface and go to Advanced > System Tools > Administration > Remote Management, then enable and configure the Remote Management as needed.

After that, you may use https://WAN_IP_ADDRESS_OF_THE_ROUTER to remotely access your Router.

However, if you encounter difficulties accessing the web interface of your router remotely, try the following troubleshooting steps:

    1. Ensure that Remote Management is properly enabled and configured on your router.

    2. Check if your router's WAN IP address is a public IP or not, if not, it means there is another NAT or router in front, you will need to configure port forwarding on the front router.

    3. Check if your router's firmware is up-to-date. If not, update it to the latest version.

    4. Make sure that the port used for remote management is not blocked by your ISP or firewall.