Cannot connect to devices behind TL-ER7206 from ISP Modem WiFi Router
Good day! I hope everyone is doing well. I would like to ask assistance if this setup of mine still has a chance or would need additional device. My goal is to utilize what I currently have to not spend more on another device if possible.
Devices Involved:
-TL-ER7206 Router (DHCP Server Enabled)
-ISP A (Globe) Modem WiFi Router (DHCP Server Enabled, using all default settings provided by ISP)
-ISP B (PLDT) Modem WiFi Router (DHCP Server Enabled, using all default settings provided by ISP)
(No internet or does not work if I make the IP addresses of the 2 ISP Modems the same subnet as the TL-ER7206 Router)
-PC
-Laptop 1
-Laptop 2
Network Setup:
-ISP 1 and 2 are connected to WAN ports of the TL-ER7206 Router
-PC is connected to LAN port of TL-ER7206 Router
-Laptop 1 is connected to ISP A Modem WiFi Router
-Laptop 2 is connected to ISP B Modem WiFi Router
*From the PC behind the TL-ER7206 Router, I can ping just fine to Laptop 1 and 2 while they are connected on the said ISP Modems. This is a proof that I have a path going to them
*ISSUE*
Laptop 1 and 2 cannot ping back to PC
It seems something is blocking the connection going IN to the LAN of TL-ER7206 Router
*DESIRED OUTCOME*
Able to connect devices wherever they are connected
Either on behind TL-ER7206 Router, ISP A Modem WiFi Router or ISP B Modem WiFi Router
I hope someone can help me figure this out, what I am missing or if this is not achievable. Open to suggestions.
Thank you and have a good day