45 day old R6400 router won't connect to one parti...

45 day old R6400 router won't connect to one particular IP address to our cPanel; but direct connect through the modem works fine. After speaking with Bangladesh it was clear the poor fellow did not get the problem. He even asked me what I needed to access the cPanel to our website for. Finally he said if he didn't know anything he could not help me. I concluded he did not know anything and hung-up in frustration. I'll take the device back and get a different brand; NEVER a NetGear again.