A curated collection of tools for networking, DNS, OSINT, security, and general sysadmin work.
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| WhatIsMyIPAddress | https://whatismyipaddress.com | Public IP lookup and geolocation | Networking | Free | Check public IP / user location |
| IPInfo | https://ipinfo.io | IP intelligence and ASN lookup | Networking / OSINT | Free tier | Investigate IP ownership |
| Cloudflare Speed Test | https://speed.cloudflare.com | Speed, latency, jitter testing | Networking | Free | Troubleshoot slowness |
| Global Ping | https://globalping.io | Remote ping/traceroute | Networking | Free | Test connectivity globally |
| IPLeak | https://ipleak.net | Detect IP/DNS leaks | Networking / Privacy | Free | Diagnose VPN issues |
| BGP Toolkit | https://bgp.tools | BGP/ASN analysis | Networking / BGP | Free | Investigate routing issues |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| MXToolbox | https://mxtoolbox.com | DNS/email diagnostics | DNS / Email | Free tier | Mail delivery issues |
| DNS Dumpster | https://dnsdumpster.com | DNS recon and mapping | DNS / OSINT | Free | Map infrastructure |
| ViewDNS | https://viewdns.info | DNS/domain tools | DNS / OSINT | Free | General DNS lookup |
| IntoDNS | https://intodns.com | DNS health checks | DNS | Free | Detect DNS misconfig |
| DNSViz | https://dnsviz.net | DNSSEC validation | DNS / Security | Free | Debug DNSSEC |
| WhatsMyDNS | https://www.whatsmydns.net | DNS propagation check | DNS | Free | Check propagation |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| Pingdom Tools | https://tools.pingdom.com | Website performance test | Web / Monitoring | Free | Check if site is slow |
| Down For Everyone Or Just Me | https://downforeveryoneorjustme.com | Global uptime check | Web / Monitoring | Free | Confirm outage |
| URL Redirect Checker | https://wheregoes.com | Redirect tracing | Web / Debugging | Free | Debug redirects |
| Web Check | https://web-check.xyz | Website inspection | Web / Debugging | Free | Quick diagnostics |
| SecurityHeaders | https://securityheaders.com | HTTP header analysis | Web / Security | Free | Check security headers |
| SSL Labs | https://www.ssllabs.com/ssltest | TLS configuration testing | Security / Web | Free | Debug SSL issues |
| Hardenize | https://www.hardenize.com | Domain security posture | Security / Web | Free tier | Audit domain |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| VirusTotal | https://www.virustotal.com | Malware scanning | Security / OSINT | Free tier | Check suspicious files |
| ANY.RUN | https://app.any.run | Interactive sandbox | Security / OSINT | Free tier | Analyse malware |
| Hybrid Analysis | https://www.hybrid-analysis.com | Malware sandbox | Security / OSINT | Free tier | Deep analysis |
| Joe Sandbox | https://www.joesandbox.com | Advanced sandbox | Security / OSINT | Free tier | Advanced threats |
| URLScan | https://urlscan.io | Site behaviour analysis | Security / OSINT | Free tier | Investigate phishing |
| AbuseIPDB | https://www.abuseipdb.com | IP reputation | Security / OSINT | Free tier | Check malicious IP |
| Talos Intelligence | https://talosintelligence.com | Threat intel lookup | Security / OSINT | Free | Check domain/IP |
| Greynoise | https://viz.greynoise.io | Scan noise intelligence | Security / OSINT | Free tier | Identify scanners |
| Shodan | https://www.shodan.io | Device search engine | OSINT / Recon | Free tier | Find exposed services |
| Censys | https://search.censys.io | Asset search engine | OSINT / Recon | Free tier | Enumerate assets |
| crt.sh | https://crt.sh | Certificate transparency | OSINT / DNS | Free | Find subdomains |
| Have I Been Pwned | https://haveibeenpwned.com | Breach lookup | Security / OSINT | Free | Check accounts |
| Exploit Database | https://www.exploit-db.com | Public exploit DB | Security | Free | Find exploits |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| CyberChef | https://gchq.github.io/CyberChef | Data decoding tool | Analysis / IR | Free | Decode payloads |
| PacketTotal | https://packettotal.com | PCAP analysis | Analysis / IR | Free tier | Analyse captures |
| Wireshark | https://www.wireshark.org | Packet analysis | Networking / Analysis | Local tool | Deep troubleshooting |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| Nmap | https://nmap.org | Port scanning | Networking / Security | Local tool | Scan hosts |
| Angry IP Scanner | https://angryip.org | IP range scanning | Networking / Scanning | Local tool | Quick subnet scan |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| OpenSSL | https://www.openssl.org | Crypto toolkit | Security / Crypto | Local tool | Debug certificates |
| XCA | https://www.hohnstaedt.de/xca | PKI management | Security / PKI | Local tool | Manage certs |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| Git | https://git-scm.com | Version control | Development | Local tool | Manage code |
| Visual Studio Code | https://code.visualstudio.com | Code editor | Development | Local tool | Scripting/dev |
| Name | Link | Purpose | Category | Access | Use Case |
|---|---|---|---|---|---|
| Crontab Guru | https://crontab.guru | Cron helper | Reference / DevOps | Free | Write cron |
| cheat.sh | https://cheat.sh | CLI cheatsheets | Reference / DevOps | Free | Command lookup |
| cheat.sh tar | https://cheat.sh/tar | Tar reference | Reference / DevOps | Free | Tar usage |
| cmd.ms | https://cmd.ms | Windows commands | Reference | Free | Quick commands |
| M365 Maps | https://m365maps.com | Microsoft 365 diagrams | Reference / Cloud | Free | Understand architecture |
| endoflife.date | https://endoflife.date | Lifecycle tracking | Reference | Free | Check EOL |