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I have been trying to scan live hosts that is connected to my home network using nmap but it keeps on returning the IP address of my router and my personal computer.

I tried using the following commands with nmap:

$ sudo nmap -sP xxx.xxx.xxx.xxx/24

$ sudo nmap -sP -PT80 xxx.xxx.xxx.xxx/24

Both of these commands did return on 2 live hosts, that is my laptop's and router's IP addresses.

Am I missing something?

  • Are you saying there are some other connected devices are not showing up in the NMAP result ? – Kaizhe Huang Apr 27 '16 at 5:37
  • In version 2.4 and more, the command has a new form: -sn ... refer to nmap page for more info. – Emadeddin Apr 27 '16 at 6:58
  • @Dere0405 Yes, I have at least 4 live hosts connected to modem/router of a home network. I am trying to search for those live hosts using a laptop via Wi-Fi connection. My scan only returns my laptop's and router's IP addresses. – user97673 May 2 '16 at 5:23
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The nmap flag -sP is depreciated and is now -sn(no port scan.) I am unsure what the -PT80 is for, are you trying to scan for port 80 or set a timing template? You didn't tell us if you had anything else connected to the network or what exactly your network setup is so I can't really speculate further. In any case try this nmap command instead:

$ nmap 192.168.1.1-255 #replace with your own home IP range
  • -PT80 is the scanning option of devices who are using port 80. – user97673 May 2 '16 at 5:17
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    -p is port yes, but -P isn't anything and -T is timing template which accepts a number between 0 and 5. -PT80 either doesn't do anything or doesn't work as intended. – torchhound May 2 '16 at 5:52

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