DNS Toolkit
activeDNS, WHOIS, and RDAP tooling — resolution, availability checking, and protocol deep-dives.
Knowledge Base 20
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- guide Claude Code vs Codex Plugins — Native Agent Packages
- article Akamai Bot Manager Detection in 2026
- article JA4+ Fingerprints — JA4S, JA4H, JA4X, JA4L, JA4SSH
- article JA4 in WAF Rules — Cloudflare and Google Cloud Armor
- snippet Safari JA4 Fingerprint t13d2014h2 — TLS ClientHello
- article JA4T TCP Fingerprinting — SYN Window, MSS, Options
- article HTTP/2 Fingerprinting: The Akamai Format
- snippet JA4 Fingerprint Decoder
- article TCP Fallback in High-Throughput DNS Scanners — Connection Reuse
- article EDNS0, UDP Buffer Sizes, and Why DNS Scanners Get Truncated
- snippet JA4 Fingerprint t13d1516h2_8daaf6152771_d8a2da3f94cd
- snippet massdns Has No --max-queries or QPS Flag
- article Building a High-Throughput DNS Scanner in Go
- note Domain Registration: From ICANN to Your Browser
- note TLS Fingerprinting with curl_cffi
- guide DNS Resolution: The Full Picture
- note WHOIS Is Dead, Long Live RDAP
- note AIMD Rate Limiting for API Clients
- article How Websites Detect Bots in 2026 — JA4 & HTTP/2 Fingerprinting
- snippet HTTP Status Codes That Actually Matter