ssl certificate expired - SSL certificate has expired

root@linuxfix:~/ssl_certificate_expired$

ssl certificate expired

SSL certificate has expired

Solutions

Prerequisites: Start by updating your system to resolve common issues and ensure the solutions provided below are compatible with your current environment.

check_latest_version && sudo apt update && sudo apt upgrade -y

Check certificate expiry

Verify certificate dates:

openssl x509 -in cert.pem -text -noout | grep "Not After"

echo | openssl s_client -connect domain:443 2>/dev/null | openssl x509 -noout -dates

Renew certificate

Get new certificate:

sudo certbot renew

sudo certbot certonly --webroot -w /var/www/html -d domain.com

sudo systemctl reload nginx

Check auto-renewal

Verify renewal is working:

sudo certbot renew --dry-run

crontab -l | grep certbot

systemctl status certbot.timer

What is ssl certificate expired?

SSL certificate is past expiration date, causing browser warnings and connection failures.

Common scenarios: Certificate expired, not renewed in time, or clock synchronization issues.

Common Causes

Certificate past expiration
Auto-renewal failed
Clock skew
CA certificate expired
Certificate not properly installed

Debugging Tips

curl -I https://domain.com

openssl s_client -connect domain:443

certbot certificates

Prevention

Set up auto-renewal
Monitor certificate expiry
Test renewal process

Additional Resources

Let's Encrypt Guide

SSL certificate management

ssl certificate expiry security