I made a website it works for everyone except for the site owner, who cannot access the site. He gets a server could not be found error. I went to his house and the issue occurs for all of his devices (PC, laptop, iPhone using WiFi) when I turn WiFi off the iPhone it works.
So I thought it was a problem on his router so I reset is router to default factory settings but it still does not work, I have flushed his DNS cache and his browser cache. But nothing seems to help. He cannot even PING the server using the domain name. However when he uses the IP address he can see the site fine.
I looked in cpanel for an blocked IP addresses but cannot see anything. What could be stopping just him from accessing the site via domainname and not the IP address?
Site details are: PHP, osCommerce it is hosted by site5 on my reseller account.