I have to say right off the batt, I'm by far no networking guru. I'm for sure very good with servers, but some of this networking stuff is somewhat out of my league like RDNS.
If I check my domain using the Pingdom tools (http://dnscheck.pingdom.com/?domain=techcores.com), I noticed that it's complaining about my reverse DNS record (server1.techcores.com.27.106.38.in-addr.arpa) that I had my host set.
On the other hand, I do know why it's complaining about too few IPv4 name servers though. That's not a problem. It's only one server hosting the site so if the server is down, a second IP won't do any good...
The error is the following: Reverse for 18.104.22.168 points to an unknown host name (server1.techcores.com.27.106.38.in-addr.arpa). The PTR record for the address points to an unknown host name.
Does anyone see any problems with my configuration?: http://grab.by/grabs/0445d304733ac8952cd8ae9ed447edfc.png
Thanks for the help! Virtualmin has saved my butt a few times when making some quick and rather critical changes.