Network Utilities
Diagnose connectivity issues with Ping, Port Check, DNS Lookup, and HTTP Header analysis.
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What this tool does
This suite aggregates common network diagnostic utilities to validate connectivity, DNS resolution, and server configuration. It performs active checks against a target host to verify reachability and retrieve public record data.
When engineers use this
- Port Check: Verifying firewall rules by attempting TCP handshakes on specific ports (e.g., 443, 22).
- DNS Lookup: Troubleshooting propagation issues by querying A, MX, and NS records directly.
- HTTP Headers: Inspecting server response headers for security policies (HSTS, CSP) or caching configuration.
- Ping: Measuring round-trip latency and packet loss to a remote endpoint.
How to interpret the results
- Open/Closed: Indicates if the target accepted the connection request.
- Resolution: The IP address(es) returned by the authoritative nameserver.
- Status Code: The HTTP response code (e.g., 200 OK, 301 Moved) returned by the web server.