Hi dear kofec thank you for your response. yes, as you said D-Link is responsible for providing internet. can you please explain what do mean by merging Wan to Lan?
I tried to change the scenario to what I understood from your post and still no success. I just changed IP in /etc/config/network and restarted network service in /etc/init.d/network and then connected the cable to D-Link. I just changed the IP and connected it to D-Link, should I do anything in D-Link?
=> here is the new scenario:
=> and here is the result from D-Link Traceroute:
Host: 192.168.2.1
RESULT: Traceroute Status: The host name is unknown
=> and no ping or access to services from my Wan Network.