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Interent access via WatchGuard after Server Change

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Last Modified: 2019-03-22
I am in the process of changing out a file server.  It is the only server on the network.
Access to the internet is through a WatchGuard XM25 appliance
The Domain name is the same, but the DNS has changed.  The WatchGuard provided internet connection for a few minutes, and now there is no internet connection.  I can remote into the network with the WatchGuard SSL-VPN utility, and access the computers.  

Any thoughts on why I cannot access the internet from behind the WatchGuard Appliance?

The old server was 2008R2 and the new server is 2016Standard
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Commented:
do the whatchguard use the internal DNS as forwarder?
so if you remove one (old) DNS server the Whatchguard is unable to resolve names for Proxy/scannig/contentfiltering after DNS cache is timed out.

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Commented:
That seems to be what is happening.  Unfortunately the watchguard appliance failed.  I am in the process of installing another appliance.

Will see how that one goes

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Commented:
On a new installation, how would one get the watchguard to resolve the first time.
Commented:
This problem has been solved!
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