One of the maintenance tasks for web administrator is to ensure website SSL certificate is renewed before it expires. Having expired certificate gives untrusted feeling to your visitor, and it may cause reputational loss and security vulnerability.
Interesting stats show 18% of expired SSL certificates found in fortune 1000 website.
Another statistics by BuiltWith
For intranet based website SSL certificate, you may use an OpenSSL command.
openssl s_client -connect yourwebsite.com:443 2>/dev/null | openssl x509 -noout –enddate
Let’s go through online tools, which will help you to monitor SSL Certificate and alert in advance before it expires. The good thing about this is, you don’t have to install any software.
StatusCake sends you the reminder a week before it expires. All you have to do is to add https URL in their monitoring, and you are all set. So go ahead and add your website URL to get it alerted before cert expiry.
2. Certificate Expiry Monitor
Certificate Expiry Monitor is an open source tool, which alerts you through email if cert expires in 90, 60, 30, 14, 7, 5, 3, 2 and 1 day. Having multiple checkpoints ensure you don’t miss to renewal.
Not only SSL Cert expiry monitoring but also many more features like Malware Scanning, Whois Monitoring, Phishing Attempts, SQL Injection, Blacklist Monitoring, etc. are provided by SUCURI.
4. SSL Certificate Monitoring
You can add up to three hosts to check SSL certificate and get notified when it’s about to expire. However, free registration allows you to add more than three hosts and in-depth information.
Get notified when certificates are about to expire along with following checks.
- Authority CA
- Common Name
I hope above tools helps you to monitor SSL certificate and notify