I am using Archer c20 router. It works fine in wireless and ethernet connection. But I face problem when i connected a router(tenda) through LAN1 to the Archer c20 router. The tenda router connected successfully with the Archer router. Bt from tenda router I just able to use youtube.com and google search. Other websites are not accessable. I need to use extra router connected to the archer router. But I cannot figure out whats going on. Please help me.