RE: Azure IoT hub certificates Expiration

Øyvind — Fri, 20 Aug 2021 13:32:46 GMT

Hello,

[quote user=""]Is rootCA,public and private certificates valid for only for 30 days ? or Is it just the rootCA certificate ?[/quote]

Certificate expiration is user defined, they can pick whatever duration they want. Typically you want something very long for the device certificate (like 30 years).

[quote user=""]I had some difficulties in generating rootCA for the second time from the same system and I created it another computer.Will that be an issue ? Do I need to create all the certifictaes in the same computer ? [/quote]

No. Certificates are in the end random strings, they can be generated everywhere and don't need to be generated on the same device.

[quote user=""]Is it mandatory to delete the old rootCA certificate from IoT hub ?[/quote]

No, Azure IoT Hub allows multiple root CAs in DPS: https://docs.microsoft.com/en-us/azure/iot-dps/tutorial-custom-hsm-enrollment-group-x509.

Kind regards,
Øyvind