Please accept my sincere apologies for this issue. By way of explanation:
I know yesterday, when I put a ticket in, I was informed that the registrar suspended the Centova domains by mistake.
That's correct. We have 4 geographically-dispersed nameservers to avoid any kind of DNS outage, and our registrar, in their infinite wisdom, went and suspended all of our domains which rendered all 4 nameservers completely useless.
In a nutshell, the registrar decided to verify our WHOIS contact information by contacting our (heavily spam-filtered, but valid) public WHOIS email address, and the verification emails were not received on our end. The registrar didn't bother to notify us of the situation at our primary email address on file with them (at which we normally receive all important correspondence from the registrar) until the very last minute (and on a Sunday, no less) and then proceeded to arbitrarily suspend all of our domains the next day due to the lack of verification.
We acted immediately to correct the situation when we realized what was happening (and subsequently submitted a letter of complaint, as I feel that it was ridiculous that this should have happened at all), however it is the nature of DNS that changes to the nameservers registered for a domain can take up to 24hr to propagate. And if you're using a caching nameserver, you may (as noted by kahfluie) want to clear your DNS cache to speed up the process.
Everything should be back to normal at this point, however -- in fact, if you can access forums.centova.com to post here, then you are clearly able to reach the centova.com nameservers.
I ran service named restart, and yes, thats the correct one... gives message stopping / starting..
Running nscd, just gives the unrecognized service message.
If you're still seeing this today, then it's likely that your DNS resolver has cached the changes made by our registrar and is (incorrectly and in violation of RFCs) ignoring the TTL they've specified, thereby causing your server to still see our domains as "suspended". There could be other causes, but that's by far the most likely.
FYI it's important to note that the error message you're seeing is ONLY a DNS resolution test. We happen to use license1.centova.com as the hostname to check as part of the test (simply because we know that license1.centova.com is a hostname that should always resolve) but the test is not actually licensing-related. So if you're getting this error message, then your server is definitely unable to resolve DNS (be it for any domain, or just for centova.com).
Yeah, I recently submitted a ticket... how long I wait for a reply, is the question.. -_-
If you opened it within business hours, you'll get a reply within about 2hr, or often sooner.