What About Modern Networks?
Due to the use of the Windows Firewall in Windows XP SP2 and later, networks with Windows XP, Vista and 7 machines are unlikely to provide any information to scan attempts as long as they remain firewalled.
The NetBIOS protocol is therefore unable to retrieve the required information as it is with Windows 2000 networks. Whereas under these circumstances AngryIP might return the following details:
• DOMAIN - Windows domain or workgroup
• USER - currently logged in user
• COMPUTER - Windows computer name
• MAC - MAC address of the network card
…under the later Windows OS, this information is limited. Interestingly Windows XP devices will not display a username by default; however, with the Windows Messenger Service activated this can be overcome.
Scanning a network with AngryIP (or a similar app) can reveal considerable information that will allow you to tighten up your network security, whether you are running a small domestic network or you’re responsible for the network security of an entire organization.