# Connection problem from UA expert to ignition OPC UA server **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [December 28, 2023, 6:53pm UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582 "2023-12-28T18:53:31Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Eric\_Truffet1](https://avatars.discourse-cdn.com/v4/letter/e/ee59a6/32.png) [@Eric\_Truffet1](https://forum.inductiveautomation.com/u/Eric_Truffet1)\ **Post date:** [December 28, 2023, 6:53pm UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582/1 "2023-12-28T18:53:31Z")
Hello, I have a probleme to connect to Ignition OPC UA server with UA expert, is not working despite that I add put on Security settings of opc ua server on ignition, I didnt'find problem , someone have a idea? Many thanks for yours helps! Eric ![config client opcua](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/9/09186ce134912d05bca71a3333ea01791107484f.png) ![error de connexion](https://us1.discourse-cdn.com/inductiveautomation/original/3X/b/0/b0983a4fa514916e7a718b1148396a3a4c4f1af6.png) ![resultat code](https://us1.discourse-cdn.com/inductiveautomation/original/3X/c/1/c1099c4c71c25776d6ecf254f1a462e9cd01e79f.png) ------Message error in Ignition--------------- | UascServerAsymmetricHandler | 28Dec2023 19:45:35 | Error installing security token: StatusCode{name=Bad\_SecurityChecksFailed, value=0x80130000, quality=bad} | | --- | --- | --- | | org.eclipse.milo.opcua.stack.core.UaException: no matching endpoint found: transportProfile=TCP\_UASC\_UABINARY, endpointUrl=opc.tcp://localhost:62541/discovery, securityPolicy=Basic256Sha256, securityMode=SignAndEncrypt | | | | at org.eclipse.milo.opcua.stack.server.transport.uasc.UascServerAsymmetricHandler.lambda$openSecureChannel$3(UascServerAsymmetricHandler.java:410) | | | | at java.base/java.util.Optional.orElseThrow(Unknown Source) | | | | at org.eclipse.milo.opcua.stack.server.transport.uasc.UascServerAsymmetricHandler.openSecureChannel(UascServerAsymmetricHandler.java:400) | | | | at org.eclipse.milo.opcua.stack.server.transport.uasc.UascServerAsymmetricHandler.lambda$sendOpenSecureChannelResponse$1(UascServerAsymmetricHandler.java:311) | | | | at org.eclipse.milo.opcua.stack.core.channel.SerializationQueue.lambda$encode$0(SerializationQueue.java:59) | | | | at org.eclipse.milo.opcua.stack.core.util.TaskQueue$TaskWrapper.run(TaskQueue.java:273) | | | | 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) | | | ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [December 28, 2023, 8:24pm UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582/2 "2023-12-28T20:24:52Z")
Instead of filling out those advanced settings use the "Custom Discovery" option with the endpoint URL you specified. ---
**Author:** ![Eric\_Truffet1](https://avatars.discourse-cdn.com/v4/letter/e/ee59a6/32.png) [@Eric\_Truffet1](https://forum.inductiveautomation.com/u/Eric_Truffet1)\ **Post date:** [December 28, 2023, 8:59pm UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582/3 "2023-12-28T20:59:22Z")
Thanks for your very quick response ! 🙂 I got old configuration of UA expert and Ignition which run perfectly and I arrive to transfer in last Ignition version with all configuration and i arrive to fix problem. I think that it was problem from my UA expert configuration and certificate trust acceptance each times that we restore gateway. Topics is fix for me Thanks again for your response Eric ---
**Author:** ![dWiseman](https://avatars.discourse-cdn.com/v4/letter/d/c67d28/32.png) [@dWiseman](https://forum.inductiveautomation.com/u/dWiseman)\ **Post date:** [May 14, 2025, 11:39am UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582/4 "2025-05-14T11:39:24Z")
Hello, I am having the same issue and cannot figure out how to fix it. I am struggling to understand what exactly you did you fix it? Cheers, David ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [May 14, 2025, 11:55am UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582/5 "2025-05-14T11:55:01Z")
The "Custom Discovery" option discussed here is this: ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/7/1709b84c2fbb327acec9a7bca6681e1af6484288.png) ---
**Author:** ![dWiseman](https://avatars.discourse-cdn.com/v4/letter/d/c67d28/32.png) [@dWiseman](https://forum.inductiveautomation.com/u/dWiseman)\ **Post date:** [May 14, 2025, 12:02pm UTC](https://forum.inductiveautomation.com/t/connection-problem-from-ua-expert-to-ignition-opc-ua-server/83582/6 "2025-05-14T12:02:56Z")
Kevin, Thanks for the very prompt response. Funnily enough I did try that but after I changed the bind IP away from local host to the computers IP. I suppose that broke the link for that browse. This worked for me. Cheers, David