Error “SEC ERROR UNKNOWN ISSUER” using SSL certificate signed by our domain CA with Firefox on IGEL OS


I’m really struggling with this. We run an IIS site in a Windows domain that uses a certificate signed by our domain CA, but since the IGEL OS is not in the domain, Firefox on IGEL gives me a SEC ERROR UNKNOWN ISSUER error. I can add it as an exception for that browser session, but that’s not a workable solution. I tried to export the certificate (as BASE6 cer) and tried to import it using UMS by adding it as a File with Web Browser Certificate classificiation. However it doesn’t seem to make any difference. Am I missing something obvious?

Learn more, read the entire thread inside the IGEL Community o Slack

I’m using the following settings in Browser Global:


You need to import as an SSL or Common certificate. Then it should work


I usually set the cert file in ums as all purpose though not in the excact same use case as yours.


I ran into the same issue. I needed to import the cert and classify it as “SSL Certificate”

Continue reading and comment on the thread ‘Error “SEC ERROR UNKNOWN ISSUER” using SSL certificate signed by our domain CA with Firefox on IGEL OS’.  Not a member? Join Here!

Learn more, search the IGEL Knowledge Base



Ask a question or comment on the above message thread?

Join or log in to the IGEL Community to ask us anything and meet other IGEL customers, partners, and EUC enthusiasts.

Submit a question, or Join Today!


Popular Message Threads


Categories & Tags: