@vjmandala 

Hi, thanks for posting question on our community.

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.

For your situation,Archer AX6000 does not get a public IP, you may need to do port forwarding on Archer VR1600v. 

To set up the Virtual Server/Port Forwarding on the DSL modem router, you may try these steps:

    1. Log into the web-based interface via http://tplinkmodem.net

    2. Go to Advanced > NAT Forwarding > Virtual Servers, then click "Add".

    3. Click "Scan" and choose the desired service (e.g., HTTP). The external port, internal port, and protocol will be automatically filled. Enter the PC's IP address (e.g., 192.168.1.100) in the Internal IP field.

After that, the local service could be accessed over the internet by http://WAN IP+ Port number, for example, http://8.8.8.8:80. The WAN IP on the DSL modem router should be a public IP address. If your WAN IP is assigned dynamically by the ISP, it's recommended to set up DDNS on the DSL modem router.

For more details, please refer to this FAQ.