I have been having connectivity issues with my Desktop and two laptops. I have a Hitorn Modem (bridge mode) Use an Apple Airport Extreme as my main router. For the longest time I have had no issues with connectivity. Of late I am not able to connect to the web via wired connections. Ethernet connected to Hitron via a Dlink Switch. 

I have looked far and wide and followed all the advice and instructions. resetting  the modem, flush the DNS and reset the network configurations. etc etc to no avail. However I chanced upon a advice that asked me to change the MAC ids of the desktop and laptops and on doing so I am able to access the web. however I have to constantly change the MAC IDs everytime I  logon. This is becoming a pain. I cannot find the advice page anymore but do recall that it mentioned to ask the ISP to reset something. Any help is appreciated. TIA.