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If you have added a permanent security exception for your router, and if this regeneration is done improperly, Firefox will detect the change as a possible attack.Ī long term solution for older routers is to contact your hardware vendor and see if updates are available for your device which fix this problem. Older routers will sometimes improperly regenerate their security certificates instead of keeping the same one for the life of the device. This article describes the cause of this problem and how to work around it. Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL.

Please get a new certificate containing a unique serial number. The error page will include the message, Your certificate contains the same serial number as another certificate issued by the certificate authority. Note: Unlike other security warnings, a Secure Connection Failed error page does not allow you to bypass the error.