Jack was attempting to fingerprint all machines in the network using the following Nmap syntax:
invictus@victim_server:~$ nmap -T4 -0 10.10.0.0/24
TCP/IP fingerprinting (for OS scan) xxxxxxx xxxxxx xxxxxxxxx. QUITTING!
Obviously, it is not going through. What is the issue here?
A. OS Scan requires root privileges
B. The nmap syntax is wrong
C. The outgoing TCP/IP fingerprinting is blocked by the host firewall
D. This is a common behavior for a corrupted nmap application
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When you are running the same command on Zenmap getting error illegal option -0 so that is -O.
The unmasked message of nmap should be
“tcp/ip fingerprinting (for os scan) requires root privileges. quitting!”
I suppose that the “-0” in command may be an OSR mistake.
*OCR(Optical Character Recognition) mistake
The outgoing TCP/IP fingerprinting is blocked by the host firewall
How do you tell? Care to share or explain please?
Es verdad que la sintaxis no existe, pero quizás sea un error del que hizo la pregunta. Si nos fijamos en el mensaje de error, y que pone quitting, estamos ante un problema de privilegios, pues si la syntaxis está mal nmap devuelve el siguiente error:
nmap: unrecognized option ‘-0’.
Adicionalmente, si te fijas, nmap pone OS Scan, por lo que efectivamente está haciendo un -O,
nmap syntax is wrong
They probably misspelled O with 0 (zero). But the actual answer to this question is A if you google search the same question anywhere else.
With zero it generates a different response:nmap:unrecognized option