Free and Opensource software review, Operating system review, Tips and Tricks, System tweaks, troubleshooting, Tools and Techniques, Hacks

Angry IP Scanner – Network Scanner

Angry IP ScannerIP Scanner is a very fast, simple network scanner which scans for ip addresses and ports in a network. The main application of this IP Scanner is that it scans a range of ip’s in the network and finds out the alive host. It scans the range of ip addresses you specify and open ports in these ip addresses.

IP Scanner

Using this IP Scanner is very easy, you can specify either you want to scan  range of ip’s or you randomly need to check alive hosts within a large range or you need to know status of  only certain ip’s whom you have as a list. Just select the appropriate option, add the necessary Fetchers from the Tools menu and then click on start button and this little scanner will check for the alive hosts and its ports. The Fetchers gathers information about the host like ping time, hostname, open ports.

IP Scanner

Once the scanner has completed scanning the ip’s, it will display the scan statistics and the list of ip’s it scanned showing the number of alive and dead hosts and the number of open ports for the alive hosts. Alive hosts are those hosts that respond to ping request where as dead hosts are the ones that do not respond to ping request.This does not mean that there are no open ports in the hosts that are displayed dead, the ping requests may be blocked by a firewall. In order to scan these hosts fully, check “scan dead hosts” in the Tools->Preferences dialog.

Angry IP Scanner could use different methods for pinging the hosts. You can choose the appropriate method from the Preferences dialog.

ICMP echo – is the most commonly used and standard method for pinging a host. But in most cases the problem in using this ping technique is that, firewall software in the host disables sending of ICMP echo reply packets, this makes alive hosts appear like dead in the scan results.

UDP – sends UDP datagrams to the host’s ports and looks for any response. This is a non-standard procedure.

TCP – This method tries to connect to the http port (80) on the host.

TTL (time to live) – this fetcher works with ICMP pinging method only.

IP Scanner is cross platform so this little smart guy works in Linux, Windows, Mac OS X etc. It is widely used by the network administrators to monitor and manage their network and some script kiddies who really like experimenting software’s (my observation – strictly unofficial). The results obtained after scanning can be stored to CSV, TXT, XML or IP-Port list files. This project is free and opensource so if you happen to be a programmer (java) you can increase the functionality of the scanner to any extend by developing new plugins. 

, , ,

Leave a Reply

Your email address will not be published. Required fields are marked *