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Chrome and Google DNS

You should lock down your DNS. No machine should be calling out to the DNS upstream. You should setup a local DNS relay so that all DNS goes through that, and that machine can then relay upstream to the ISP DNS.

That said, you may find one day that your box is calling out to DNS on 8.8.8.8 or 8.8.4.4. A quick ARIN lookup on those and you see it's Google. Turns out, if you are using Chrome, then you will see these DNS requests appear in your logs.

Chrome calls up to 8.8.8.8 and 8.8.4.4 to check "internet" health. If it can't get a connection to those IP addresses then it boldly proclaims there is no internet connection.


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