OK, the first step is to see if you have DNS resolution.
Open a command window, type in ‘nslookup’
At the prompt, enter the domain name, such as ‘google.com’
It should answer with an IP address. If it says it can’t find that domain, you don’t have DNS resolution on your DNS server.
What’s a command window? (See what I mean about being challenged)
I had been able to access this website until 2 days ago.