---
id: 4766
title: "Recon series #4: Port scanning – uncovering attack vectors by revealing open ports and hidden services"
source_domain: yeswehack.com
source_url: "https://www.yeswehack.com/learn-bug-bounty/recon-port-scanning-attack-vectors"
published_at: "2025-04-25 12:01"
tags: ["bug-bounty", "nmap", "shodan", "recon", "masscan", "port-scanning"]
phying_url: "https://phying.com/item/4766"
lang: en
---

# Recon series #4: Port scanning – uncovering attack vectors by revealing open ports and hidden services

## Summary

Recon series #4 on port scanning: passive scans via Shodan and Censys, active TCP/UDP techniques, banner grabbing, firewall evasion, and tools including Nmap, Masscan, Naabu and httpx.

## Intelligence Metadata

- **Sources:** yeswehack.com
- **Published:** 2025-04-25 12:01
- **Original:** https://www.yeswehack.com/learn-bug-bounty/recon-port-scanning-attack-vectors
- **Phying News:** https://phying.com/item/4766