Your server also needs DNS. If you are not setting up your own DNS servers, then you need to use those 2 IPs in your server as dns servers. In linux, those are in /etc/resolv.conf where you put the entry as
nameserver <ip address1>
nameserver <ip address2>
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Thanks for the replies. Also done some more reading on the subject.
So these open dns ip addresses as resolvers basically allow outgoing connections from the server to hosting provider and other servers etc. to obtain updates etc.?
Where as the actual private nameservers that can be setup also through WHM must use different ips (like extra ips allotted with server package)and unlike resolver ip allow incoming connections...ex. pointing domain names at a registrar to server?
So is there any reason not to setup these resolvers provided by the dedicated server hosting provider? cpanel email functioning etc.?
Should there be things to look out for once enabled? I keep reading about open dns and ddos attacks. I would not be setting up my own dns servers so if I was to change the resolvers it would be the ones provided by the hosting company.
Anyways if someone could answer these few questions I would appreciate it.