Troubleshooting AD authentication issues due to port exhaustion issues

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Troubleshooting AD authentication issues due to port exhaustion issues

https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/tcp-ip-port-exhaustion-troubleshooting

If found system event id 4231:

Get the processes consuming too much ports:

Get-NetTCPConnection | Group-Object -Property State, OwningProcess | Select -Property Count, Name, @{Name="ProcessName";Expression={(Get-Process -PID ($_.Name.Split(',')[-1].Trim(' '))).Name}}, Group | Sort Count -Descending



nlteest /sc_verify:domainname


Enable debug for Netlogon:

https://learn.microsoft.com/en-us/troubleshoot/windows-client/windows-security/enable-debug-logging-netlogon-service 

Nltest /DBFlag:2080FFFF

 

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