This guide explains why penetration testers need a target’s true IP, how to detect CDN usage, and provides step‑by‑step techniques—including same‑country queries, sub‑domain probing, DNS history checks, FOFA searches, email reverse lookup, and full‑network scanning—to uncover the real server address.
This guide explains why CDNs hide a site's true IP, how to determine if a website uses a CDN, and outlines practical techniques—including DNS queries, online tools, sub‑domain analysis, email reverse lookup, and scanning scripts—to bypass the CDN and discover the real server address.
Fav-up is a Python‑based utility that combines Shodan data and website favicons to help security researchers uncover the true IP addresses of target services, offering flexible command‑line options, module integration, and output formats for comprehensive IP discovery.
This article introduces Fav-up, a Python-based IP discovery tool that leverages Shodan and website favicons, explains how to install it, details its command‑line options and usage examples, and shows how to integrate it as a Python module for network reconnaissance.
