Some misconfigured firewalls trust traffic from specific source ports (e.g., port 53 for DNS, port 20 for FTP). Nmap allows you to spoof the source port.
Free Command:
nmap --source-port 53 <target_ip>
Most firewalls block standard ports (e.g., 80, 443). Scan less common ports or use decoys to hide your real IP. Most firewalls block standard ports (e
Free Command (Nmap):
nmap -D RND:10,ME -p 22,80,443,8080,8443 <target_ip>
Most honeypots (e.g., Honeyd) emulate services at the kernel level. They often reply to TCP SYN packets instantly, while real systems have micro-delays. Most honeypots (e
Free Python script snippet:
from scapy.all import *
import time
pkt = IP(dst="target_ip")/TCP(dport=22, flags="S")
start = time.time()
resp = sr1(pkt, timeout=2)
end = time.time()
if resp and (end - start) < 0.001:
print("Potential honeypot (instant SYN-ACK)")
Firewalls filter traffic based on ports, protocols, and IPs.
Free techniques: Introduction
In ethical hacking
Free tool: nmap, proxychains
Introduction
In ethical hacking, knowing how to evade detection is just as important as finding vulnerabilities. Defenders use IDS (Intrusion Detection Systems), firewalls, and honeypots to catch attackers. But as an ethical hacker, you need to test if those defenses can be bypassed — safely and legally.
Here’s a quick, free guide to understanding evasion techniques.
IDS evasion is an art. You need to make the attack look like normal traffic.
Some misconfigured firewalls trust traffic from specific source ports (e.g., port 53 for DNS, port 20 for FTP). Nmap allows you to spoof the source port.
Free Command:
nmap --source-port 53 <target_ip>
Most firewalls block standard ports (e.g., 80, 443). Scan less common ports or use decoys to hide your real IP.
Free Command (Nmap):
nmap -D RND:10,ME -p 22,80,443,8080,8443 <target_ip>
Most honeypots (e.g., Honeyd) emulate services at the kernel level. They often reply to TCP SYN packets instantly, while real systems have micro-delays.
Free Python script snippet:
from scapy.all import *
import time
pkt = IP(dst="target_ip")/TCP(dport=22, flags="S")
start = time.time()
resp = sr1(pkt, timeout=2)
end = time.time()
if resp and (end - start) < 0.001:
print("Potential honeypot (instant SYN-ACK)")
Firewalls filter traffic based on ports, protocols, and IPs.
Free techniques:
Free tool: nmap, proxychains
Introduction
In ethical hacking, knowing how to evade detection is just as important as finding vulnerabilities. Defenders use IDS (Intrusion Detection Systems), firewalls, and honeypots to catch attackers. But as an ethical hacker, you need to test if those defenses can be bypassed — safely and legally.
Here’s a quick, free guide to understanding evasion techniques.
IDS evasion is an art. You need to make the attack look like normal traffic.