We have enabled internal host detection in GP portal with "enforce users to connect GP" option to yes. There is no internal portal and internal gateway configured.
When user walk into office GP connecting as a internal.
We have set our DNS server ip in internal host detection. I was thinking about failover perspective, what if this DNS server is down due to disaster/DR drill activity , other DNS server will be there in user's LAN adapter to provide reverse DNS response for specified hostname.
But connectivity to specified hostname(in our case DNS server) is require for successful internal host detection ? or it just success only with reverse DNS lookup.
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