Network Security
Network security covers the practices and technologies used to protect computer networks, devices, and data from unauthorized access, disruption, and misuse. It helps administrators identify exposed services, detect suspicious activity, control traffic, and maintain reliable communications across local and remote networks. The field also includes tools for testing defenses and understanding how network protocols behave under different conditions.
Open source tools in this area include network scanners, traffic monitors, firewalls, DNS services, honeypots, and utilities for secure tunneling or security assessment. When choosing a tool, consider its license, maintenance activity, documentation, system requirements, and compatibility with existing infrastructure. Check that its capabilities fit your security goals and that testing is authorized. These tools can support network administrators, security researchers, developers, and organizations assessing or protecting their own systems.
6 repositories · updated May 5, 2026
NoDPI: A Python Utility for Bypassing Deep Packet Inspection
NoDPI is an open-source Python utility designed to bypass Deep Packet Inspection (DPI), a technology often used by internet service providers to censor and filter traffic. It works by intelligently modifying network packets, making it harder for DPI systems to identify and block certain connections. This cross-platform tool provides a straightforward, easy-to-use solution for users seeking to circumvent internet censorship and access blocked web resources.
sshpot: A Simple SSH Honeypot for Logging Login Attempts
sshpot is a straightforward SSH honeypot designed to capture login attempts. It logs usernames, passwords, IP addresses, and timestamps without ever authenticating users. This tool is useful for security research and monitoring malicious activity.
CloakQuest3r: Uncovering Real IPs Behind Cloudflare and Reverse Proxies
CloakQuest3r is an open-source Python tool designed for security professionals to uncover the real origin IP addresses of websites protected by Cloudflare and other reverse proxy services. It achieves this through comprehensive subdomain enumeration, DNS history analysis, and SSL certificate examination. This tool is invaluable for authorized security testing and strengthening web infrastructure defenses.
RustScan: The Modern, Fast, and Extensible Port Scanner
RustScan is a cutting-edge port scanner designed for speed and efficiency, capable of scanning all 65k ports in just 3 seconds. It features a powerful scripting engine supporting Python, Lua, and Shell, allowing for automated task execution and seamless integration with tools like Nmap. With adaptive learning capabilities and a focus on accessibility, RustScan offers a modern and highly customizable solution for network security professionals.
DarkFlare: Stealthy TCP-over-CDN Tunnel for Firewall Piercing
DarkFlare is a stealthy command-line tool designed to create TCP-over-CDN tunnels, effectively disguising TCP traffic as innocent HTTPS requests. This enables users to bypass restrictive firewalls and network censorship by leveraging widely accessible CDN infrastructure like Cloudflare. It operates with both client and server components, ensuring secure and scalable access to blocked content or internal resources.
Blocky: Fast and Lightweight DNS Proxy and Ad-Blocker for Your Network
Blocky is a fast and lightweight DNS proxy designed to function as an ad-blocker for your local network. Written in Go, it offers extensive features including advanced DNS configuration, various protocol support like DoH and DoT, and robust security and privacy measures, making it an excellent self-hosted solution.