Free Network Mapping Tools
This may not be a post for my regular readers.
So, I’ve been contracting for two weeks now and there’s a ton of work to do.
For those of you who know me, and know how I tend to approach what I do, one of my main goals is to get good documentation. If you look at my resume, you know that I have changed jobs a lot. And with every change has come a new, mostly-undocumented network for me to discover and, hopefully, improve. As a result, I’ve used a bewildering array of network mapping and scanning tools. Dark Reading has a list of free and low-cost network mapping tools, many of which I’ve used. Since they review them all, I’ll only comment on the ones I’ve actually used and found useful.
First, there’s the venerable nmap. Nmap has been around for a while and most of the more hardcore geeks, like me, have used it. (And, yes, there is a Windows version of it, if you really want to use that.) It’s probably one of the most complete, and oldest, tools on this list. Though it’s more of a security finger-printing tool than a mapping tool in the sense that most of us mean. Still, a security tool old enough and good enough to actually be used on-screen in The Matrix is pretty okay with me.
For simple listing of the IP addresses and hosts on a network, I really like Overlook Fing. It’s pretty basic and actually command-line based with a Windows launching text interface to configure it. The output is pretty basic, but you can quickly dump a list of device names and IP addresses, with probable manufacturer information to help identify the machines. Also, they seem to have added a paid service that monitors your network and alerts you to changes, which seems interesting, but I’m usually on a budget, so I’ll stick with the free option.
If you want a nicer interface and more Windows-optimized IP network scanner, try Advanced IP Scanner. Again, it’s pretty basic and simple, but it’s also free and super easy to use. And, starting with at least a list of IP addresses with host names may be more documentation than a lot of new network administrators start with when they take over a network.
And, then there’s Spiceworks, which most folks think of as a helpdesk ticketing system, but actually has some fantastic network management and mapping tools built into it, too. In fact, I initially installed it at my last full-time gig to keep track of all the user requests I was getting, but really ended up loving it for the reporting tools and ability to track machines on the network. It’s free, and takes a little bit of work to get setup right for pulling in all the details of your network, but it’s totally worth it. The user support forums are great and there are a lot of tools and custom reports being added for it all the time. If you hunt a bit, you can find pretty much every answer to your question on the user forums. I even found a way to automate emailing the weekly reports to everyone in IT and management.
One tool that Dark Reading does not mention that I find useful is Network Notepad. Again, a free tool, but with a paid option. The free tool, which is all I’ve used, is great for making an actual graphic map of your network. It takes a little getting used to, but once you get the hang of it, this is a pretty valuable tool. For instance, if you add the IP address to the host on the map, you can ping or RDP right from the network map to the device. In fact, I liked it so well, I whipped together an object library, using someone else’s free 3D icons, that I’ve attached to the bottom of this post. So, enjoy that and enjoy your weekend!
