🕵️♂️ Part 2: Advanced Port Scanning & Evasion Techniques
Attackers split the TCP header over several packets. Some legacy inspection tools struggle to reassemble and analyze the packets in real time. 🕵️♂️ Part 2: Advanced Port Scanning & Evasion
available TCP and UDP ports on any given machine, acting as communication endpoints for applications. Common Scanning Techniques There are Scans like "Xmas" (setting FIN, PSH,
Sophisticated attackers don't just use loud, default scans. They leverage evasive maneuvers to bypass traditional firewalls and Intrusion Detection Systems (IDS). acting as communication endpoints for applications.
At its core, a port scan probes a server or host to see which ports are "listening" (open) and what services are running. There are
Scans like "Xmas" (setting FIN, PSH, and URG flags) or "Null" scans (no flags set at all) manipulate the TCP state machine to see how the OS responds, mapping out the architecture without leaving heavy footprints. 🚨 Part 3: How Snort Defends Your Network
The scanner attempts to complete the full TCP three-way handshake (SYN, SYN-ACK, ACK). It is highly accurate but easily logged by the target operating system.