# OPCUA Client on Debian Linux -- server Cert Path?

**URL:** <https://discourse.nodered.org/t/opcua-client-on-debian-linux-server-cert-path/94657>\
**Category:** Industrial\
**Tags:** opcua\
**Created:** [15 January 2025 21:50 UTC](https://discourse.nodered.org/t/opcua-client-on-debian-linux-server-cert-path/94657 "2025-01-15T21:50:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![slh](https://avatars.discourse-cdn.com/v4/letter/s/bb73d2/32.png) [@slh](https://discourse.nodered.org/u/slh)\
**Post date:** [15 January 2025 21:50 UTC](https://discourse.nodered.org/t/opcua-client-on-debian-linux-server-cert-path/94657/1 "2025-01-15T21:50:27Z")

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I am using node-red-contrib-opcua (latest) to make a simple flow involving OPCClient.

When run on a Windows machine, my flow works as expected (connects to remote OPC server, subscribes, etc).

When I deploy the **same** flow to node-red running on Debian Linux, the client goes into a reconnect loop and there is also a console logged error that I have an invalid endpoint.

When i look into the node-opcua code, I see that the default server certificates path is windows based (APPDATA prefix). How do I customize the server certificates path for the OPCClient node-red node on linux?

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [16 March 2025 21:50 UTC](https://discourse.nodered.org/t/opcua-client-on-debian-linux-server-cert-path/94657/2 "2025-03-16T21:50:30Z")

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