When looking at a certificate in the certificate management section of the Administrator, a certificate is invalid, with the following error in the ‘Warnings’ tab :
The revocation status of the certificate or one of the certificates in the certificate chain is unknown. The certificate revocation list that the certificate chain relies on is currently offline.
This means that the server is not able to access the revocation list of the certificate.
A revocation list is a list which is provided by the Certificate Authority which authorises a certificate.
The certificate authorities make available a list of all the certificates which have been revoked (ie not valid due to some reason).
If the server is not able to access this list, it cannot check whether the certificate is valid.
The Data Interchange Plc server will need to be able to access the internet unrestricted, so that it can check the revocation list. |