How to get a list of all valid IP addresses in a local network?

Question

Is there a way to get a list of all valid IP addresses in a local network? I mean all IP addresses that each user is using in the network.

Accepted Answer

Install nmap,

```
sudo apt-get install nmap
```

then

```
nmap -sP 192.168.1.*
```

or more commonly

```
nmap -sn 192.168.1.0/24
```

will scan the entire .1 to .254 range

This does a simple ping scan in the entire subnet to see which hosts are online.

Solution