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--- smisguest_connection_workaround [2020/01/06 09:00] – [Chrome on MacOS] Feldmeyer, DJ
+++ smisguest_connection_workaround [2020/01/07 04:54] (current) – [Firefox SEC_ERROR_REUSED_ISSUER_AND_SERIAL error] Feldmeyer, DJ
@@ Line 32: / Line 32: @@
   - At the following screen, click the "Accept the Risk and Continue" button.\\ {{:faq:firefox3.jpg?nolink|Accept Risk and Continue button}}
   - Log into the guest network.
+==== Firefox SEC_ERROR_REUSED_ISSUER_AND_SERIAL error ====
+In some cases you may see the following error in Firefox:
+<code>Secure Connection Failed.
+Please contact the server administrator or email correspondent and give them the following information: Your certificate contains the same serial number as another certificate issued by the certificate authority. Please get a new certificate containing a unique serial number.
+Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL</code>
+Please follow the instructions below to clear this error.
+=== Windows ===
+  - Close all instances of Firefox
+  - Delete C:\Users\%userprofile%\AppData\Roaming\Mozilla\Firefox\Profiles\%profile.default%\cert_override.txt
+  - Delete C:\Users\%userprofile%\AppData\Roaming\Mozilla\Firefox\Profiles\%profile.default%\cert8.db
+  - Proceed as above
+=== MacOS ===
+  - Close all instances of Firefox
+  - Go to folder: ~/Library/Application Support/Firefox/Profiles/<profile folder>
+  - Delete cert_override.txt & cert9db
+  - Proceed as above