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WARNING: This feature is experimental and modifies your optional interface configuration. Backup your configuration before using OpenVPN, and restore it before upgrading. "; $spane = ""; } else { $spans = $spane = ""; } ?> CRL name Description       Note: A CRL (certificate revocation list) is used when a particular key is compromised but when the overall PKI is still intact. Suppose you had a PKI consisting of a CA, root certificate, and a number of client certificates. Suppose a laptop computer containing a client key and certificate was stolen. By adding the stolen certificate to the CRL file, you could reject any connection which attempts to use it, while preserving the overall integrity of the PKI. The only time when it would be necessary to rebuild the entire PKI from scratch would be if the root certificate key itself was compromised.