System Administration & Network Diagnostic Tools

Browser-based operational checks for DNS, SSL/TLS, email authentication, WHOIS, IP and ASN data, blacklist status, port reachability, and HTTP headers. Built for sysadmins, hosting engineers, DevOps, SREs, developers, and IT support teams.

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Operational checks

On-demand browser checks for DNS, TLS, mail, IP, HTTP, and reachability troubleshooting.

Result interpretation

Results can vary by resolver cache, network path, source IP, CDN/proxy behavior, registry data, and blacklist provider.

Observable signals only

The tools report protocol responses and externally visible signals, not hidden internal server state.

Common infrastructure checks

Start with the workflow that matches the incident, deployment change, or configuration review.

DNS propagation after record changes SSL/TLS certificate chain review SPF/DKIM/DMARC check IP/ASN lookup Blacklist check HTTP header inspection SMTP connectivity test Port reachability check
Infrastructure Diagnostics
9 tools

DNS Lookup

Query A, AAAA, MX, TXT, CNAME, NS, and other DNS records.

Diagnostics

Ping Test

Check host reachability and latency from the OpsCheck server.

Diagnostics

SSL Certificate Checker

Inspect certificate validity, issuer, SANs, expiry, and chain details.

Diagnostics

Port Scanner

Check selected TCP ports for reachability from this server.

Diagnostics

IP Geolocation

Look up approximate IP location, ASN, ISP, and network ownership data.

Diagnostics

HTTP Headers

Inspect redirects, cache headers, security headers, and server response metadata.

Diagnostics

WHOIS Lookup

Look up domain registration, registrar, nameserver, and RDAP/WHOIS data.

Diagnostics

Redirect Chain Analyzer

Follow HTTP redirects and inspect each hop

Diagnostics

TLS Scanner

Inspect supported TLS versions, cipher suites, and certificate configuration.

Diagnostics
Email & DNS
7 tools

Email Authentication

Check SPF, DKIM, and DMARC DNS records for mail authentication alignment.

Email

SMTP Tester

Test SMTP connectivity, banner response, and STARTTLS support.

Email

DNS Propagation

Compare DNS answers across recursive resolvers after record changes.

Email

Reverse DNS

Resolve PTR records and map IP addresses back to hostnames.

Email

SPF Flattener

Inspect SPF include chains and generate a flattened SPF record candidate.

Email

Email Header Analyzer

Parse message headers to review routing, authentication, and delivery signals.

Email

SPF & DMARC Generator

Generate baseline SPF and DMARC DNS records for common mail setups.

Email
Security & Vulnerability
10 tools

WHM Exposure Checker

Compare direct WHM on port 2087 with WHM service-subdomain access over HTTPS port 443.

Security

Blacklist Checker

Check whether an IP address or domain appears on common DNSBL and mail reputation blocklists.

Security

Package Vulnerability Checker

Check individual packages for CVEs via NVD API

Security

SBOM Vulnerability Scanner

Review SBOM package entries against available vulnerability data.

Security

Hosting Panel CVE Scanner

Scan hosting panels for CVEs — cPanel, Plesk, Webmin, HestiaCP

Security

Certificate Transparency Search

Search CT logs for issued certificates

Security

CORS Header Tester

Test Cross-Origin Resource Sharing configuration

Security

DNSSEC Chain Validator

Validate DNSSEC trust chain for a domain

Security

HTTP/2 & HTTP/3 Checker

Check HTTP protocol support and ALPN negotiation

Security

Bulk DNS & SSL Checker

Check multiple domains in one pass

Security
Developer Utilities
14 tools

Base64 Encoder/Decoder

Encode and decode Base64 strings for transport and configuration checks.

Developer

Hash Generator

Generate common hashes for checksums, identifiers, and comparison workflows.

Developer

URL Encoder/Decoder

Encode and decode URL components for logs, redirects, and query strings.

Developer

JSON Formatter

Format, validate, and inspect JSON payloads and configuration snippets.

Developer

Timestamp Converter

Convert Unix timestamps and date formats for logs and incident timelines.

Developer

SSL Certificate Decoder

Decode and inspect PEM/DER certificates

Developer

User Agent Parser

Parse user-agent strings to identify client, browser, OS, and device signals.

Developer

MAC Vendor Lookup

Look up vendor prefixes from MAC addresses for network inventory checks.

Developer

IPv6 Tools

Expand, compress, and inspect IPv6 addresses for troubleshooting.

Developer

Subnet Calculator

Calculate CIDR ranges, usable hosts, broadcast address, and subnet details.

Developer

Password Strength Checker

Evaluate password length, entropy indicators, and common weakness patterns.

Developer

JavaScript Minifier

Minify or beautify JavaScript snippets for inspection and deployment prep.

Developer

HTML Minifier

Minify or beautify HTML markup for inspection and deployment prep.

Developer

CSS Minifier

Minify or beautify CSS code for inspection and deployment prep.

Developer