# OPC UA Certificate Generation Requires IP Address

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-certificate-generation-requires-ip-address/115208>\
**Category:** Ignition\
**Created:** [April 22, 2026, 7:34pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificate-generation-requires-ip-address/115208 "2026-04-22T19:34:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dcarpenter](https://avatars.discourse-cdn.com/v4/letter/d/a88e4f/32.png) [@dcarpenter](https://forum.inductiveautomation.com/u/dcarpenter)\
**Post date:** [April 22, 2026, 7:34pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificate-generation-requires-ip-address/115208/1 "2026-04-22T19:34:32Z")

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I am trying to re-generate the OPC UA server certificate on my Ignition instance. I do not want to include an IP address in the cert's alternative name, only a hostname. If I leave the IP address field blank, I am unable to generate the certificate.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/7/178a168781447055282e4a1678a6487060b967cc.png)

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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 22, 2026, 7:53pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificate-generation-requires-ip-address/115208/2 "2026-04-22T19:53:35Z")

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This is a dumb bug we just recently fixed. The field needs something for form validation right now :-/

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**Author:** ![dcarpenter](https://avatars.discourse-cdn.com/v4/letter/d/a88e4f/32.png) [@dcarpenter](https://forum.inductiveautomation.com/u/dcarpenter)\
**Post date:** [April 22, 2026, 9:25pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificate-generation-requires-ip-address/115208/3 "2026-04-22T21:25:56Z")

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Awesome! Is the fix in a stable release or still in nightlies?

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**Author:** ![Marcus\_Sysum](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/marcus_sysum/32/57944_2.png) [@Marcus\_Sysum](https://forum.inductiveautomation.com/u/Marcus_Sysum)\
**Post date:** [April 22, 2026, 9:49pm UTC](https://forum.inductiveautomation.com/t/opc-ua-certificate-generation-requires-ip-address/115208/4 "2026-04-22T21:49:02Z")

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The fix is in the latest 8.3.5.