This is an alternative to the "disable loopback check" which is no
longer recommended by Msft due to security concerns related to local
activation.

Create a new Multi-String Value

Set the value of the BackConnectionHostNames with one entry per line

If the steps above don’t work modify the hosts file appropriately in c:\windows\system32\drivers\etc to contain references to to local IP address for each hostname
Problem
You are able to browse SharePoint normally from external sources, but when you attempt to access SharePoint on the local server for anything other than the machine name you are presented with multiple login prompts that ultimately result in a login errorExplanation
The http request fails because a loopback check runs and fails preventing Kerberos from succeeding (because there’s no SPN for the url you are using to access SharePoint)Solution
As always, take backups, snapshots, and test in staging!!!You will need registry access to complete the steps mapped out below
Firstly, open regedit and search for MSV1_0Create a new Multi-String Value
Set the value of the BackConnectionHostNames with one entry per line
If the steps above don’t work modify the hosts file appropriately in c:\windows\system32\drivers\etc to contain references to to local IP address for each hostname
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