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Error is "sec_error_unknown_issuer", regardless of deleting either cert8.db, or cert_override.txt, resetting FF, or anything, I can't ADD Exception, Works in IE

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HahnsPCs
HahnsPCs
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I get this from the server that runs the WatchGuard SPAM Filter, and I USED to be able to add an exception, and it was fine.

Under "Technical Details" I get:

"An error occurred during a connection to sp-servername.domain.local:4119.

Peer's Certificate issuer is not recognized.

(Error code: sec_error_unknown_issuer)"

Clicking the "Add Exception" Button does NOTHING...

I can take the URL, copy/paste it into IE, and it works fine... It's happening on multiple systems... All Windows 7 All FF Version 37.0.1

I get this from the server that runs the WatchGuard SPAM Filter, and I USED to be able to add an exception, and it was fine. Under "Technical Details" I get: "An error occurred during a connection to sp-servername.domain.local:4119. Peer's Certificate issuer is not recognized. (Error code: sec_error_unknown_issuer)" Clicking the "Add Exception" Button does NOTHING... I can take the URL, copy/paste it into IE, and it works fine... It's happening on multiple systems... All Windows 7 All FF Version 37.0.1

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guigs
guigs
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The unknown issuer error is due to the certificate not being recognizable.

What version was the last time that you could do this? There was a change in 36-37 to the CA certificate policy:

The official issuer list:

To override: