TLS Certificate Checker — Network and Email Security Diagnostic
NetworkTLS Certificate Checker checks an entered domain on the server and checks tls certificate subject, issuer, and expiry details.
What is it
TLS Certificate Checker lets the Utillica server inspect DNS, email authentication, redirects, TLS, and HTTP security headers and summarize them for operational checks. Localhost, private IPs, link-local, and metadata hosts are blocked for SSRF protection. Results are references, not security guarantees.
Input → server probe with SSRF defense, timeout, hop limit → pass/warn/fail reference result
How to use
- 1Enter the domain.
- 2Press check.
- 3Review records, policy, redirects, headers, or certificate results.
Reference
| Input | Result |
|---|---|
| domain | checks TLS certificate subject, issuer, and expiry details |
Sources & standards
- HTTP Semantics - IETF
- The robots.txt file format - IETF
- Sitemaps XML protocol - Sitemaps.org
- The Open Graph protocol - Open Graph protocol
- WHOIS Protocol Specification - IETF
- The Transport Layer Security (TLS) Protocol Version 1.3 - IETF
FAQ
Can it check internal networks or localhost?
No. Localhost, private IP, link-local, and metadata hosts are blocked to reduce abuse and SSRF risk.
Does pass guarantee security?
No. pass/warn/fail is a reference judgment based on currently visible signals, not a security audit.