Day 19 Information Gathering by Using Netcat

With this command you will be able to describe whether your ssh service is open or not.

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┌──(root㉿kali)-[~]
└─# nc -vv 147.00.00.00 22     
yourtarget-domain.com [147.00.00.00] 22 (ssh) open
SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u4

With this command you will be able to describe whether your ftp service port 21. See about information header service -vn

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nc -vn 147.00.00.00 21
(UNKNOWN) [147.00.00.00] 21 (ftp) : Connection timed out