Problem: When you access web application with in the SharePoint sever, it keeps on prompting for authentication.
Solution: Disable Loop Back Check
The following step has to be followed to disable the loop back check in SharePoint Servers,
Step 1: Open the Registry Editor (regedit)
Step 2: Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa in registry
Step 3: Create the dword32 for DisableLoopbackCheck
Step 4: modify the value to 1
Recommended Option: Run this power shell command
New-ItemProperty HKLM:\System\CurrentControlSet\Control\Lsa -Name “DisableLoopbackCheck” -value “1” -PropertyType dword
You may have to restart the servers and will have run this from all of your SharePoint servers.