dns-networking

To debug DNS resolution issues, you run queries using tools like dig and nslookup against the target domain to inspect record retrieval. This Skill diagnoses DNS query failures, propagation status, and configuration problems across Linux, macOS, and Windows environments.

The best way to test network connectivity and open ports is using utilities like curl, ping, and nc to verify reachability. This Skill guides port testing and connectivity checks to identify if remote services are actively accepting connections on specific ports.

Yes, you can diagnose TLS certificate and HTTPS connection errors using curl and related CLI tools. This Skill handles TLS and certificate diagnostics for HTTPS, allowing you to verify secure connections and pinpoint handshake or certificate validation failures.

Yes, this network troubleshooting approach works on Linux, macOS, and Windows environments. It leverages common CLI tools like dig, nslookup, curl, ping, and nc to ensure consistent DNS and connectivity diagnostics across different operating systems.

To check firewall and proxy configurations when HTTP requests fail, you test traffic routing and port accessibility using curl and nc. This Skill automates firewall, proxy, and DNS propagation checks to isolate whether network rules or misconfigured proxies are blocking traffic.