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Collection of Useful Technical Resources
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DNS & Networking
Security Tools
System & Software
Web Development
DNS & Networking
Cloudflare DNS Help
Official help documentation for Cloudflare's 1.1.1.1 DNS service
Quad9 DNS
Secure DNS resolver with malicious domain blocking
Quad9 Status Map
Visual status map for Quad9 DNS services worldwide
DNS Speed Test
Compare performance of different DNS resolvers
DNS Leak Test
Test if your DNS requests are leaking outside your VPN
Google DNS Query
Query specific domains through Google's DNS service
MX Toolbox
Comprehensive DNS, mail server, and network diagnostic tools
WhatsMyDNS
Global DNS propagation checker
Security Tools
Internet Secure
Resources for internet security and privacy
SSL Certificate Decoder
Decode and analyze SSL certificates
SAML Tools
Online tools for SAML authentication testing
Have I Been Pwned
Check if your accounts have been compromised in data breaches
SSL Labs Server Test
Analyze the SSL/TLS configuration of websites
Security Headers
Analyze HTTP response headers of websites
System & Software
Ninite
Bulk install and update popular software
Google Toolbox
Collection of Google's diagnostic tools
AlternativeTo
Find software alternatives for various platforms
VirusTotal
Analyze suspicious files and URLs for malware
Shodan
Search engine for Internet-connected devices