How to fix error error-authentication-firewall-failed in Windows 11

Solution Steps

1. 1 Press Windows key + R, type 'wf.msc', and press Enter. This opens Windows Defender Firewall with Advanced Security. This is the control panel for all firewall rules.
2. 2 Click on 'Inbound Rules' in the left pane. Look for any rules that are blocking the specific program or port. If you know the program, find it in the list. Right-click and select 'Enable Rule' if it's disabled, or 'Properties' to check the action.
3. 3 In the Properties window, go to the 'Action' tab and ensure 'Allow the connection' is selected. If it's set to 'Block', change it to 'Allow' and click OK. This directly fixes the authentication failure by allowing the connection.
4. 4 If you can't find a specific rule, create a new one: Click 'New Rule...' in the right pane. Select 'Program' or 'Port' depending on what you need. Follow the wizard to allow the connection. This ensures the firewall doesn't block the authentication.
5. 5 After making changes, restart the Windows Firewall service: Press Windows key + R, type 'services.msc', and press Enter. Find 'Windows Defender Firewall', right-click, and select 'Restart'. This applies the changes.
6. 6 Test the connection again. If the error persists, reset the firewall to default: In the same wf.msc window, right-click on 'Windows Defender Firewall with Advanced Security' and select 'Restore Default Policy'. This removes all custom rules, which can fix corrupted settings.