why your Web Server’s IP is 192.168.1.25?
I think the Computer which run the Web Server is connect to the GL-MT300N-V2 (Node 1) , right?
The computer should get a IP like 192.168.10.x from the GL-MT300N-V2 (Node 1).
You should use the IP(192.168.10.x) of the computer.
Make sure the two router can ping each other, and try connect the web server by router GL-MT300N-V2 in Site B, If everything goes well, web server should can be connected by router GL-MT300N-V2 in Site A.
Yes, from my PC on site A, I can ping the GL-MT300N-V2 on site B and I can also access the Control Panel of the GL-MT300N-V2 on site B by typing his LAN IP (192.168.10.1) in the address bar .
Therefore the connection should work.
The problem is that I cannot reach webserver2 (192.168.10.25) which is connected to the LAN port of the GL-MT300N-V2 on site B.
So I can’t reach clients on the LAN side of the GL-MT300N-V2 on Site B. But I can reach devices which are connected with the WAN side of the GL-MT300N-V2 on Site B, e.g. the webserver1 on Site B with the IP 192.168.1.25 is reachable from my PC on Site A.
Here is an overview of how the devices are connected.