SSL Certificate Checker
Analyze SSL/TLS certificates for any domain to verify security configuration and monitor expiration.
When to Use
- - Checking SSL certificate expiration dates
- Verifying certificate chain and issuer
- Troubleshooting HTTPS connection issues
- Auditing website security configuration
- Monitoring certificates before renewal
When NOT to Use
- - Penetration testing (this is read-only)
- Internal network certificates (use dedicated tools)
- Certificate installation (this only checks, doesn't install)
Examples
Basic Certificate Check
```bash
Check certificate for a domain
openssl s_client -connect example.com:443 -servername example.com /dev/null | openssl x509 -noout -dates -subject -issuer
Get detailed certificate information
echo | openssl s_client -connect example.com:443 -servername example.com 2>/dev/null | openssl x509 -noout -text
SSL证书检查器
分析任意域名的SSL/TLS证书，以验证安全配置并监控证书过期时间。
使用场景
- - 检查SSL证书过期日期
- 验证证书链和颁发者
- 排查HTTPS连接问题
- 审计网站安全配置
- 在续期前监控证书状态
不适用场景
- - 渗透测试（此为只读操作）
- 内部网络证书（请使用专用工具）
- 证书安装（仅检查，不执行安装）
示例
基础证书检查
bash
检查域名的证书
openssl s_client -connect example.com:443 -servername example.com /dev/null | openssl x509 -noout -dates -subject -issuer
获取详细证书信息
echo | openssl s_client -connect example.com:443 -servername example.com 2>/dev/null | openssl x509 -noout -text
