View computers on network

[Vexiphne]

Does anyone know of an app that I can use to view all the computers connected to my network and the IP addresses to those computers?

[SeijiSensei]

Does anyone know of an app that I can use to view all the computers connected to my network and the IP addresses to those computers?

If you know your network address and subnet mask you can use nmap like this:

nmap -sP 192.168.1.0/24

That will ping every address between 192.168.1.0 and 192.168.1.255 and list those it finds. If you have a DNS server with the reverse ("in-addr.arpa") zone for the subnet, you'll get the hostnames as well.

You can also use "nmblookup -A" from the Samba suite with an IP address to obtain the Netbios hostname that Windows computers advertise. I've written a script that uses nmap to develop the list of addresses, then iterates over them and uses nmblookup to compile a list of their Windows hostnames. I don't know of application that does the same thing.

[Vexiphne]

That was way to complicated
Isn't there a simpler way of doing it?

[desnaike]

I use etherape run from terminal with sudo command .

[SeijiSensei]

That was way to complicated
Isn't there a simpler way of doing it?

It's a one-line nmap command; how simple does it need to be?

Remember you asked to see the addresses of all the devices. If you're looking for the equivalent of a Windows "Network Neighborhood" you won't find anything that meets the requirement of all devices. NN only displays machines advertising Netbios names. Routers, network-connected printers, etc., Linux servers, etc., won't show up in NN either. nmap will list any machine with an IP address.

[VanillaMozilla]

Log in to your router? It will share that information.

[camorri]

There is a gui front end for nmap called zenmap. Then you can select ping scan from the drop down, and key in the network you want to scan.

Nmap for the most part requires root privileges. So use sudo zenmap to launch it.

[SeijiSensei]

Nmap for the most part requires root privileges. So use sudo zenmap to launch it.

Only if it's scanning ports. I can run a ping scan as an ordinary user.

[gregorydillon]

If I could hop on your thread. I've got a mixed network, two Ubuntu machines, a Windows 7, a WHS Server, and a networked printer. On one of my Ubuntu machines, when I click Places, Network, it shows all the other machines that are turned on. On the other Ubuntu machine, it does not show the names of the other machines, (although it does allow me to connect to the server)

I can't figure out what extra software, or settings I have on the machine that lists all the other computers, but I would like to.

[MestreLion]

Only if it's scanning ports. I can run a ping scan as an ordinary user.

No you can't. -sP in nmap for non-root users does NOT send an ICMP echo (the "classic" ping). Instead, it send "pings" to ports 80 and 443, which will web servers will reply. So it's quite useless...

And that is not nmap's fault: the kernel only allows root users to send ICMP echo. The only reason a user can ping is because the binary /bin/ping is setgid , meaning it runs with root privileges even when invoked by a regular user.