title: Port forwarding between two routers?
body: <p>I have an ipcamera, router_1 and router_2.</p>
  
  <p>The connection is like:</p>
  
  <p>ipcamera(192.168.1.100)->router_1(192.168.1.1)->router_2(192.168.0.1).</p>
  
  <p>Router_1's WAN port is connected to router_2's LAN port.
  My laptop is connected to router_2.
  How can I set the port forwarding so that I can access my ipcamrea?</p>