# OPC-UA Certificates, where Ignition acts as a OPC-UA Client

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-certificates-where-ignition-acts-as-a-opc-ua-client/114722>\
**Category:** Ignition\
**Created:** [March 27, 2026, 12:51pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificates-where-ignition-acts-as-a-opc-ua-client/114722 "2026-03-27T12:51:35Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![Andre\_Hennecke](https://avatars.discourse-cdn.com/v4/letter/a/e95f7d/32.png) [@Andre\_Hennecke](https://forum.inductiveautomation.com/u/Andre_Hennecke)\
**Post date:** [April 23, 2026, 2:21pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificates-where-ignition-acts-as-a-opc-ua-client/114722/21 "2026-04-23T14:21:19Z")

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Thank you for your help. We were able to connect to an OPC-UA server per CA-signed certificate and auto trust. Not sure if this is a common use-case but maybe the manual can be improved here. Anyway thank you 🙂

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**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:** [April 23, 2026, 2:22pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificates-where-ignition-acts-as-a-opc-ua-client/114722/22 "2026-04-23T14:22:39Z")

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It's not as common, but should be better documented.

I think in the ideal vision of the future, users aren't doing any of this configuration manually, and all of the OPC UA applications are managed by a GDS instead.

We support the GDS in the server but not yet for client connections.

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