Fix: Certbot Certificate Renewal Failed (Let's Encrypt)
How to fix Certbot certificate renewal failures — domain validation errors, port 80 blocked, nginx config issues, permissions, and automating renewals with systemd or cron.
Tag: ssl
6 articles
RSSFix: Python SSL: CERTIFICATE_VERIFY_FAILED
How to fix Python SSL CERTIFICATE_VERIFY_FAILED error caused by missing root certificates on macOS, expired system certs, corporate proxies, and self-signed certificates in requests, urllib, and httpx.
Fix: Nginx SSL: error:0A00006C:SSL routines::bad key / SSL handshake failed
How to fix Nginx SSL handshake failed and certificate errors caused by mismatched keys, wrong certificate chain, expired certs, TLS version issues, and permission problems.
Fix: pip SSL: CERTIFICATE_VERIFY_FAILED certificate verify failed
How to fix the pip SSL CERTIFICATE_VERIFY_FAILED error when installing Python packages, covering corporate proxies, trusted-host flags, certifi, pip.conf, macOS, Windows, and Docker environments.
Fix: curl: (7) Failed to connect / (6) Could not resolve host / (28) Operation timed out
How to fix curl errors including 'Failed to connect to host', 'Could not resolve host', 'Operation timed out', and 'SSL certificate problem'. Covers curl exit codes 6, 7, 28, 35, 56, and 60, DNS resolution, proxy settings, timeout tuning, SSL issues, retry strategies, verbose debugging, and more.
Fix: SSL certificate problem: unable to get local issuer certificate
How to fix 'SSL certificate problem: unable to get local issuer certificate', 'CERT_HAS_EXPIRED', 'ERR_CERT_AUTHORITY_INVALID', and 'self signed certificate in certificate chain' errors in Git, curl, Node.js, Python, Docker, and more. Covers CA certificates, corporate proxies, Let's Encrypt, certificate chains, and self-signed certs.