The primary problem is answered earlier - open cart is triggering a security process to throw IPs into the firewall; in itself, that's fairly basic stuff. I managed to get myself locked out the other day as well, but kindly asked for my static IP to be removed given it's a little hard to reboot a router that 10,000 other users are connected through :P
As to the DNS issue you're referring to - who'd know. More people than yourself should have been affected by that. Unless The Reefuge has been really naughty not updated their zone serial numbers, the zones for either of those sites haven't been changed for a while (so misconfiguration unlikely). Primary and secondaries are reporting the same entries, so unless bind dropped dead on both, I reckon the issue might have been elsewhere, strange as it is.
