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  Linux Network Security: nmap port scanning software
  Add Date : 2018-11-21      
  Nmap is used under Linux on a large network port scanning tool, which can detect the server tcp / ip port is now open. You can run it to make sure that have banned out unsafe port number should not be open. nmap homepage in http://www.insecure.org/nmap/index.html

Here's a simple example:

[Root @ sh-proxy / etc] # / usr / local / bin / nmap public.sta.net.cn

Starting nmap V. 2.12 by Fyodor (fyodor@dhp.com, www.insecure.org/nmap/)

Interesting ports on public.sta.net.cn (

Port State Protocol Service

21 open tcp ftp

23 open tcp telnet

25 open tcp smtp

109 open tcp pop-2

110 open tcp pop-3

143 open tcp imap2

513 open tcp login

514 open tcp shell

7000 open tcp afs3-fileserver

Nmap run completed - 1 IP address (1 host up) scanned in 15 seconds


I think it is the best use nmap port scanner tool.
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