A good port scanner is about as important to a computer hobbyist as a hammer is to a carpenter. An IP scanner can tell you many things about a target computer not only on your local network, but also remote networks.
Angry IP Scanner is a free download from http://www.angryip.org and although they offer a 64 bit and a 32 bit version for windows, I find that the 32 bit version is usually sufficient, and the 64 bit does not always work for me with the best stability. This is the windows version. On the other hand, the Linux version just screams through a list of IP’s without so much as a stutter.
Let’s look at a few things I like about Angry IP Scanner:
- Speed – This scanner can take many forms of input for IP scanning and works through any task as quick or as slow as you like. If needed, it can scan through 1000 IP’s in under a minute.
- Logging – It allows for very meticulous sorting and filtering. Why do you need to see dead IP’s or computers without open ports?
- Port Scanner – The port scanner allows for a targeted list of ports to be added to the list for inspection like 25, 80, 443, 8080, 3600, or you can do a range of numbers like 100-420, 600-1200.
- IP Input Methods – You can generate random IP’s for exploring, thousands at a time. You can import IP lists, you can scan certain subnets, or entire ranges of IP’s.
Here is what it looks like. When you start Angry IP Scanner, it will have your local IP address already filled into the boxes.
From here you can fill in that second box to a different address on your local network, and it will scan all the addresses between your numerical position on the network, and the ones with higher numerical values. Initially I wanted to say ‘scan all the IPs between you and the ending address’, but I figured that could cause some confusion.
Let’s set it to my favorite setting, RANDOM. This way, we can scan random IP’s for open services. This time, lets look for people that have terminal services open. This is signified by port 3389 responding to our cat calls. For those of you that like to get mischievous, TSGrinder would be your next step after connecting to a Terminal Services box. The most interesting ones I find are connected to Windows Server 2003 at small businesses, usually small law firms with more tech than brains.
Here, you can see, after scanning 3,000 IP’s, we have found several people with port 3389 open. This took about 45 seconds to scan, and to escalate things further would be outside of the scope of this tutorial.
Anyway guys, I hope you enjoyed this article! Always remember to share like and subscribe, if you liked it! And as always, leave your questions and comments below, I answer every single one, every time.