Single-talk network scanning (practical operation: NMAP articles)

Now this small series to introduce the network NMAP scans, to look back to the following
1. Enter the command, which displays not found, that is, we have to re-install nmap command

2. command yum reinstall

3. Enter the command, you can See native TCP port opened by the external

4. input commands to see the machine outside the opened UDP port

5. External View native TCP port opening

6. Check your phone outside open UDP port

7. detect whether there is a host of the network segment is switched

8. The input command to display the virtual machine I open port information 7-2

Conclusion: NMAP scans can detect other network host is online, if online, you can check the TCP / UDP port information to other hosts opened.

The above command can follow the steps, watching and thank you for support!