Fake OS-signature reply to nmap
In this section, we are going to create a fake OS signature. By using the following nmap
, we can identify the OS of the victim machine:
nmap -O <ip-address>
: The nmap
sends seven TCP/IP-crafted packets and evaluates the response with its own OS signature databases. For more details, you can read the web page at https://nmap.org/misc/defeat-nmap-osdetect.html.
The nmap
needs at least one open and one closed port to identify the OS. Again, we are going to use all the previous codes. The ports 445
and 135
acts as open ports and 80
act as a closed port.
Let's run nmap
as shown in the following screenshot:

It is giving a different OS, not Debian. You can make the code more complicated by learning the nmap
OS detection algorithm.