Bopup Scanner

If you need to determine which IP address on your LAN are in use and the media access control (MAC) address associated with them, Bopup Scanner from B Labs is a handy free utility that will quickly scan a range of IP addresses and provide the MAC addresses for the systems within the specified IP address range. It can also tell you if any of the systems are functioning as web servers listening on TCP ports 80 or 8080.

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Bopup Scanner

Bopup Scanner is a freeware network scanner that displays active computers with user names logged into the computers (NetBIOS), MAC and IP addresses. Bopup Scanner also recognizes and shows HTTP (Web) servers running on remote computers (TCP ports 80, 8080), if you select the option to have it scan for webservers, quickly detects online computers, and allows you to browse shared resources of a remote computer. You can save the results of a scan to a text file.

Bopup Scanner will perform a NetBIOS scan of a network, which will show Windows systems on the network. The program first tries to ping an address it is scanning. So, if you were watching its scan with a sniffer, you would see an ARP request for the IP address. If there is a reply to the ARP request, an ICMP echo request is sent to the IP address. If an echo reply is received, Bopup Scanner will then check for a response from the scanned IP address on UDP port 137. Port 137 is associated with the NetBIOS Name Service commonly used on systems running the Microsoft Windows operating system. The NetBIOS Name Service is typically how Windows computers find out information concerning the networking features offered by a computer, such as system name, file shares, etc.

Because it is only scanning for responses to NetBIOS Name Service requests, Bopup Scanner will show a red circle for IP addresses where it received no response to a NetBIOS Name Service query, even though there may be a system at that address. E.g. there may be a Linux system, networked copier, router, etc. at the address.

Regarding installation of the software, there is no installation procedure for the program. You simply run scanner.exe. When you first run it, it will create the following registry entries:

Keys added: 5
-------------
	HKEY_CURRENT_USER\Software\B Labs
	HKEY_CURRENT_USER\Software\B Labs\Bopup Scanner
	HKEY_CURRENT_USER\Software\Bopup Scanner
	HKEY_CURRENT_USER\Software\Bopup Scanner\Scanner
	HKEY_CURRENT_USER\Software\Bopup Scanner\Scanner\Settings

After starting the program, click on the Refresh button with the green arrows next to it on the toolbar menu to begin a scan of the subnet the system is on.

If you wish to check on whether a webserver is running on any of the scanned IP addresses, click on Options and check "Scan for HTTP servers (80, 8080 ports)".

You can save the results to a text file by clicking on Actions and selecting Save list.

The developer, B-Labs Software, also offers other software that can be used for secure instant messaging.

Download Bopup Scanner

Developer Website
MoonPoint Support (may not be the most current version)

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