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Brian UK View Drop Down
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Joined: 13 May 2014
Location: Surrey
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    Posted: 23 May 2019 at 09:26
The forum was offline last night, problem at the WebWiz end.
For a full explanation, read this.

We are aware of an issue with our Microsoft DNS Resolves are not able to perform DNS lookups of host names for the Shared Hosting Services.

It would appear that both primary and secondary DNS servers are missing their Root Hints.

We are working to resolve the issue.

Update 07:10
DNS Services have been running stably now for an hour and all related services are working.

We are continuing to investigate how both DNS Servers lost their Root Hints and believe that the recent Windows updates to the Domain Controllers that host the DNS services are related.

What are Root Hints?
For those who do not know what the Root Hints are, this is a file built in to DNS Servers which tell the DNS Server where the Root DNS Servers for the Internet are located in order to perform DNS lookups.

Measures to avoid this issue impacting local services
To make sure that the issue does not impact on related services such as Database Connections, we are going to also make our Domain Controllers the an Authoritative DNS Server for our DNS zone. This will make DNS lookups faster and also prevent this type of issue from affecting local services.

Better 5 minutes late in this world than years early in the next.
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