# OPC UA server faulting out

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-server-faulting-out/97266>\
**Category:** Ignition\
**Created:** [October 15, 2024, 5:21pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulting-out/97266 "2024-10-15T17:21:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![IAKC](https://avatars.discourse-cdn.com/v4/letter/i/d2c977/32.png) [@IAKC](https://forum.inductiveautomation.com/u/IAKC)\
**Post date:** [October 15, 2024, 5:21pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulting-out/97266/1 "2024-10-15T17:21:43Z")

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I was trying to troubleshoot OPC UA connection fault. It seems to be related to user name and password. I did a fresh install of Ignition just to see when it starts to fail. On a fresh install if I go to Config\>Opc\> Opc Connections and then click on the checkbox to change the password to anything else; the connection becomes faulted. If I change it back to the default password as detailed in Ignition documentation it remains faulted. (Screen shot below)

If I change the username and password, is there anything else that I need to do?

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/6/c6ecf6300efd1728ce8f5f8b016f99518165ed04.png)

Error message.

UaServiceFaultException: status=Bad\_UserAccessDenied, message=User does not have permission to perform the requested operation.  
at org.eclipse.milo.opcua.stack.client.UaStackClient.lambda$deliverResponse$5(UaStackClient.java:337)  
at org.eclipse.milo.opcua.stack.core.util.ExecutionQueue$Task.run(ExecutionQueue.java:119)  
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)  
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)  
at java.base/java.lang.Thread.run(Unknown Source)

8.1.43 (b2024082010)  
Azul Systems, Inc. 17.0.11

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<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [October 15, 2024, 5:24pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulting-out/97266/2 "2024-10-15T17:24:06Z")

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Ignition uses a loopback OPC client connection to its own internal server. If you want to change the password, you need to change it in two places: in the user source the Server is using, and in the client connection.

If you are trying to allow an external connection, consider adding another user name to the Server, with unique password, and use that externally.

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<div class="post-metadata">

**Author:** ![IAKC](https://avatars.discourse-cdn.com/v4/letter/i/d2c977/32.png) [@IAKC](https://forum.inductiveautomation.com/u/IAKC)\
**Post date:** [October 15, 2024, 7:04pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulting-out/97266/3 "2024-10-15T19:04:21Z")

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"hand hits forehead".

When in doubt reset... I restarted the OPC service in the gateway and it connects fine. I guess it needs reboot after each username/password change.