This IP Address Scanner Quickly Maps Your Home LAN

If you have a home network, then every device on that network will have an IP address.  I just counted up all the devices on my office LAN and there are 18 of them!  A desktop PC, a laptop, a couple of CCTV cameras, the router, a phone, a clever little device for monitoring temperatures around the house, and more besides.

With all that lot, it was definitely time to make a neat list of devices, and tidy up their allocation of IP addresses.

Most devices get their IP address from your router.  The router has what's called a DHCP server, which is capable of allocating an IP address to any device that asks for one.  And most devices have the ability to contact the default DHCP server, ie your router, to ask for one.  Chances are, your router will probably be configured to hand out addresses in the range of something like 192.168.1.1 to 192.168.1.200. 

So, how to make a list of all the IP devices on your LAN? If they all use DHCP, then just log into your router and ask it for a list of all the DHCP clients that are currently connected.  But if they don't all use DHCP, or you're not sure, then the router will miss some.  Which is why it can be useful, fun and educational to run a network scanning tool occasionally. 

These tools work by trying to harmlessly connect to each IP address within the range you specify, and then producing a report.  And my tool of choice for this is Advanced IP Scanner.   You can get it from http://www.radmin.com/products/ipscanner/, it's about 12 MB, and runs on all versions of Windows (32- and 64-bit) from XP onwards.

Just fire it up, give it a range of IP addresses to scan, and away it goes. 

An important word of warning, though:  Don't point such tools at ranges of public IP addresses (ie those outside your own LAN), and don't try running such a tool on your office network without the knowledge and permission of your admin guys.  It'll be regarded as a hacking attempt, and could lead you into all sorts of trouble.

 

 

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Comments

by Famatech - Advanced IP Scanner Developer (not verified) on 9. March 2011 - 16:38  (67696)

r.schifreen, thank you for the review of Advanced IP Scanner. We are pleased that you found it helpful.We have created this utility as a tool for sysadmins using Radmin remote control software.
There's a great video by one of users about Radmin integration in Advanced IP Scanner http://www.youtube.com/watch?v=RwvzVIsECe.

Famatech Team
http://www.radmin.com

by EricB (not verified) on 8. March 2011 - 15:01  (67644)

NMap is also free and shows you a lot more information for each host machine. It is more difficult to use until you get used to it, but the documentation is all online.
http://nmap.org/

by danilo2 (not verified) on 9. March 2011 - 18:35  (67698)

Don't want to steal the current top position from Famatech so... just a reply:
"the Dude" is also free and shows a lot of network information. A link:

http://www.softpedia.com/get/Network-Tools/Network-Monitoring/The-Dude.shtml

by anonymous2011 (not verified) on 8. March 2011 - 9:52  (67634)

What is the difference between this software and another one called Angry IP Scanner,I think it is the same function

by robert.schifreen on 8. March 2011 - 10:31  (67636)

Angry IP Scanner is similar. But it's a cross-platform app and thus requires Java. I've had problems with Java before so I try to avoid it if possible. Advanced IP Scanner is a native Windows app and doesn't need Java.

If you already have Java, by all means try Angry IP Scanner. I've heard good reports from people who use it. Though I also understand that it's regarded as malware by various security suites, because it could be deemed to be a hacker's tool, and thus you may find that you get a warning or you won't be allowed to download it. It is, though, perfectly safe to use.

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