I have a D-Link DIR-615 router since around six months.
My internet connection is VPN (PPTP) based, i.e. I have been given a username and password from my ISP and my IP address is dynamic. Since a few days I am experiencing a serious problem. My router connects normally (I can see the yellow light), but my computer is giving me a "DNS not responding" error.
I have tried everything (reset, reboot etc.) but no success.