First, the website https security certificate expired Analysis:
1, the current computer system time is wrong, all the http security certificate has a date of issue and expiration date, the computer system time may result in the browser prompts the website https security certificate has expired or is not yet in force outside the certificate validity interval.
2, https website's security certificate has indeed expired, issued in accordance with the international standard https security certificate, https security certificate issued not more than 39 months.
3, references to other sites deployed outside the chain https security certificate, if the certificate is expired outside the chain will prompt the error. Can be detected by a certificate chain go wrong terminal equipment: mobile browser, PC end IE6 (IE6 does not prompt above).
Second, the solution to the site's security certificate expired https:
1, the computer system at the wrong time: the time the computer system is adjusted to within the https security certificate is valid.
2, https security certificate expired: the need for site owners to https security certificate issued by CA to renew the certificate authority.
3, the current site https site outside the chain of certificate expired: Contact SSL shield in time for renewals :( recommendations apply for renewal before the expiration of 1-3, because after the expiration complete, the site will be inaccessible, affecting business website) to expire URL (domain name) to send to the SSL shield mechanism, a handle renewals procedures.
After the renewal is completed, the new certificate is installed on the server, replace the server certificate expired.
Install the certificate after completion, the site can be a normal visit, if you are using a pan-domain (wildcard) certificate,
if there's a look at two domain names missing, ensure that all domain name renewals have been completed.
These are the solutions to the https security certificate expired, I hope useful to you. More certificate issues (www.ssldun.com)