We're currently setting up our new domain, and everything is going fairly well except I've been noticing problems with the internet hanging recently so decide to investigate. First thing I do is test DNS lookups, and I notice that anything external to the school is timing out quite frequently so I ring county support to see if they're having any issues with their DNS servers (as it's only external addresses affected) they say no, but have a look into it with me anyway and discover than my first DNS server is resolving external addresses intermitently, and my second isn't resolving external addresses at all!
I look into it a bit more and discover the reason that the first one is intermittent is because one of the forwarding DNS addresses is entered wrong, I correct that and it all springs into life. My second server however had the correct forwarding addresses, but is still refusing point blank to resolve any addresses external to the school.
It's set-up as a secondary DNS server taking its data from the first, but I'm wondering if it should actually be a primary DNS server in its own right - could this be where I'm going wrong? I've checked all the other settings, and everything else is absolutely correct, the only difference is one is a primary DNS server and the other is a secondary DNS server. It resolves internal addresses absolutely fine.
Anyone shed some light on this?