Example One: %Service_Console Authentication
In this example you experiment with Password, Unauthenticated, and Cascading authentication using the Terminal.
In the first part of the example we set the authentication mechanism for %Service_Console (the service that controls the Terminal) to unauthenticated. Then we access the Terminal.
Here are the steps:
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Click %Service_Console on the Services page (click [Home] > [System Administration] > [Security] > [Services]) of the Management Portal. 
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On the Edit Definition page for %Service_Console click Unauthenticated and make sure that no other mechanism is selected.  
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Click Save. 
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Now launch the Terminal. Click the InterSystems Launcher in your System Tray. Click Terminal from the menu. 
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You are not prompted for a password. The Terminal opens immediately at the namespace prompt. USER>
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Execute the Write $UserName command at the prompt: USER>Write $UserName UnknownUser USER>Since we are using unauthenticated access, we access InterSystems IRIS through the UnknownUser account. 
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Close the Terminal. Click File—>Exit. 
This example assumes that you have installed InterSystems IRIS with minimal security, that you are connecting to a local InterSystems IRIS instance, and that you are using Windows. If you are using a local InterSystems IRIS instance in a non-windows environment, then you open a terminal session using the iris terminal command rather than the InterSystems IRIS launcher. Otherwise the exercise is the same.