Can this tool check private IP addresses or internal servers?
No. The diagnostics are designed for public domains and URLs, with protections to avoid probing private or unsafe network targets.
Available
Check Server
Enter a domain to run safe, non-intrusive diagnostics. Checks include DNS resolution, IP lookup, SSL/TLS certificate information, HTTP status, redirect chain, and security headers. Useful for troubleshooting your own fleet tracking server.
Tool Guide
Check DNS, SSL, HTTP Status, Redirects, and Security Headers
Check Server runs safe diagnostics for a public domain or URL, including DNS records, public IP resolution, HTTP reachability, redirect behavior, TLS certificate details, selected port checks, and security header clues. It is useful for troubleshooting websites, APIs, and fleet tracking servers.
Common Use Cases
- Confirm whether a domain resolves to public IPv4 or IPv6 addresses.
- Inspect SSL certificate validity, issuer, expiry, and HTTPS readiness.
- Troubleshoot frontend/backend reachability, redirects, response headers, and common server clues.
Key Features
- DNS, CNAME, NS, MX, IP, HTTP, TLS, redirect, and header diagnostics in one report.
- SSRF-protected server-side checks designed for public domains and URLs.
- Open port summary and health signals useful for Open VTS and other web deployments.
Frequently Asked Questions
What does the SSL check show?
It shows certificate validity, issuer, subject, date range, days remaining, protocol details, and authorization errors when available.
Why can a site load in my browser but fail a server check?
Differences in redirects, DNS propagation, firewall rules, TLS configuration, bot protection, or regional routing can affect automated diagnostics.
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