When I try to upload an SSL/TLS certificate, why does my Barracuda Networks product reject it with an invalid certificate error?
Scope: Applies to all Barracuda Networks products, all firmware versions.
Answer: When a Barracuda Networks product rejects a certificate as an invalid certificate, it is usually for at least one of the following three reasons:
A Barracuda unit will reject an SSL/TLS certificate if the certificate is not in the proper format. The Barracuda unit will only accept a standard X.509 certificate in PEM format. For more information on uploading a certificate in the proper format, see Solution #00001327.
A Barracuda unit may also reject a certificate if the private key on the Barracuda unit does not correspond to the certificate being installed. This is a common occurrence when trying to upload a wildcard certificate or other exported certificate to the Barracuda. For more information, see Solution #00000990.
If the certificate being uploaded does not contain all necessary intermediate certificates, it will be rejected as invalid. For instructions on uploading all needed intermediate certificates, see Solution #00001327.
For further assistance, please contact Barracuda Technical Support.