You are attempting to run an Nmap port scan on a web server. Which of the following commands would result in a scan of common ports with the least amount of noise in order to evade IDS?

The correct answer is C. nmap -sT -O -T0. -T0 option is called "paranoid" because it's slow to try and avoid detection. "While -T0 and -T1 may be useful for avoiding IDS alerts, they will take an extraordinarily long time to scan thousands of machines or ports. For such a long scan, you may prefer to set the exact…

Submitted by devops_kid· Mar 4, 2026Reconnaissance Techniques

Question

You are attempting to run an Nmap port scan on a web server. Which of the following commands would result in a scan of common ports with the least amount of noise in order to evade IDS?

Options

Anmap -A - Pn
Bnmap -sP -p-65535 -T5
Cnmap -sT -O -T0
Dnmap -A --host-timeout 99 -T1

How the community answered

(49 responses)

A
8% (4)
B
16% (8)
C
71% (35)
D
4% (2)

Explanation

-T0 option is called "paranoid" because it's slow to try and avoid detection. "While -T0 and -T1 may be useful for avoiding IDS alerts, they will take an extraordinarily long time to scan thousands of machines or ports. For such a long scan, you may prefer to set the exact timing values you need rather than rely on the canned -T0 and -T1 values." You can find this in the official documentation: https://nmap.org/book/performance-timing-templates.html

Topics

#Nmap#Port scanning#IDS evasion#Network reconnaissance#Stealth scanning

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