Hi Kevin , I am having similar issue but in my case , I have ignition edge and ignition gateway installed in the same server with two different ports. Ignition edge is running fine and in ignition gate way i am getting this certs issue . Can you please help Note: I am trying to communicate with th…

In the Ignition Gateway config section under OPC UA > Security there are tabs for Client and Server. On gateway this connection originates from look under the Client tab and make sure there is no quarantined server certificate. If there is, trust it. If the server you are connecting to is the one …

Thank you for the prompt reply! Mutual trust between edge and gateway opc UA server ? May I know how to do that mutual trust if my understanding is right please Thanks

Hey Kevin, Thank you , after I trusted in the gateway under client I do not see any fault issue and Cert issue . But we are not seeing any error in the logs also . PS: We are trying to connect through MQTT transmission to AWS greengrass EC2 using port 8883 . Here the server is giving 0 of 1 conne…

[image] user20: PS: We are trying to connect through MQTT transmission to AWS greengrass EC2 using port 8883 . Here the server is giving 0 of 1 connectivity and it is working with IOT core connectivity directly. I'm not sure what this has to do with OPC UA. Did you get the OPC UA connection …

I am sorry , ignore my previous comment. Actually after the we trusted the client certificate it is working fine. Thank you for your help

@Kevin.Herron I'm having the same issue with getting Ignition to connect to the Codesys OPCUA Server running on my GROOV RIO, it was working up until 3 days ago. I haven't updated any firmware or ignition versions either. I'm running Ignition 8.1.41. In the Ignition Gateway under the Client Tab I t…

It looks like this certificate is being generated by software written against a more recent version of the OPC UA spec, which now definitively states that for a self-signed certificate the cA bit of the BasicConstraints extension shall be set to false, with true being accepted for backwards compatib…

@Kevin.Herron If thats true then why was I able to even establish a connection from the beginning and then out of nowhere is just stopped working?

I don’t know, can’t tell you that retroactively. Working with what I have.

I am having the same problem. I have 2 Siemens PLCs both set up identical (apart from IP addresses and program) but the OPC settings are identical. I have the certificates downloaded from the TIA and installed on the Ignition machine and been through the endpoint setup both certificates are trusted …

in addition to this i have just used the Matrikon OPCUA explorere from the same server as the ignition and getting a good connection from there on both siemens OPC.

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OPC UA connection "unable to find valid certification path to requested target"

Ignition