NetBScanner - NetBIOS scanner (2024)

NetBScanner - NetBIOS scanner (1)NetBScanner v1.11
Copyright (c) 2012 - 2016 Nir Sofer
Web site: http://www.nirsoft.net

See Also

Description

NetBScanner is a network scanner tool that scans all computers in the IP addresses range you choose, using NetBIOS protocol.For every computer located by this NetBIOS scanner, the following information is displayed:IP Address, Computer Name, Workgroup or Domain, MAC Address, and the company that manufactured the network adapter (determined according to the MAC address).NetBScanner also shows whether a computer is a Master Browser.You can easily select one or more computers found by NetBScanner, and then export the list into csv/tab-delimited/xml/html file.

NetBScanner - NetBIOS scanner (2)

System Requirements And Limitations

  • This utility works on every version of Windows, starting from Windows 2000 and up to Windows 10, including both 32-bit systems and x64 systems.
  • NetBIOS scan uses UDP port 137 to send and receive the NetBIOS data. If this port is blocked by your computer or in the remotenetwork computers that you scan, the NetBIOS scan will not work.
  • When you run NetBScanner in the first time, you might get a warning from the Firewall of Windows. Even if you choose tokeep blocking NetBScanner, the NetBIOS scan will still work properly.

Versions History

  • Version 1.11:
    • Updated the internal MAC addresses database.
  • Version 1.10:
    • Updated the internal MAC addresses database.
  • Version 1.08:
    • NetBScanner now automatically skips the broadcast addresses, according to the IP addresses/Subnet masks settings of every network adapter on your system.
  • Version 1.07:
    • Fixed bug: NetBScanner failed to load the external MAC addresses file (oui.txt) when every line has 2 leading space characters. (Sometimes this file is provided with leading space characters, I don't really know why...)
    • Updated the internal MAC addresses database.
  • Version 1.06:
    • Updated the internal MAC addresses database.
    • Added 'Mark Odd/Even Rows' option, under the View menu. When it's turned on, the odd and even rows are displayed in different color, to make it easier to read a single line.
  • Version 1.05:
    • Added a few command-line options.
  • Version 1.01:
    • Fixed the sorting of the IP Address column.
    • Fixed issue: The properties and the other windows opened in the wrong monitor, on multi-monitors system.
  • Version 1.00 - First release.

Start Using NetBScanner

NetBScanner doesn't require any installation process or additional dll files.In order to start using it, simply run the executable file - NetBScanner.exe
After running NetBScanner, you have to choose the IP addresses range to scan (by default, NetBScanner takes the IP addresses range from the configuration of your network adapter) and the scan speed. Be aware that if you increase the scan speed, the NetBIOS scanmay become less reliable and miss some of your computers.

After you choose the desired scan option, click the 'Ok' button, and then NetBScanner will start scanning your network.

After the NetBIOS scan is finished, you can select one or more computers, and then export the computers list into csv/tab-delimited/xml/html file,by using the 'Save Selected Items' option (Ctrl+S)

Command-Line Options

/scan Start to scan immediately on start.
/IPAddressFrom <IP Address>
/IPAddressTo <IP Address>
Specifies the IP addresses range to scan, for example:
NetBScanner.exe /scan /IPAddressFrom 192.168.1.0 /IPAddressTo 192.168.1.254
/ScanSpeed <Speed>Specifies the scanning speed. The speed is a number between 0 and 100.
0 = very slow, 100 = very fast

Translating NetBScanner to other languages

In order to translate NetBScanner to other language, follow the instructions below:
  1. Run NetBScanner with /savelangfile parameter:
    NetBScanner.exe /savelangfile
    A file named NetBScanner_lng.ini will be created in the folder of NetBScanner utility.
  2. Open the created language file in Notepad or in any other text editor.
  3. Translate all string entries to the desired language.Optionally, you can also add your name and/or a link to your Web site. (TranslatorName and TranslatorURL values) If you add this information, it'll be used in the 'About' window.
  4. After you finish the translation, Run NetBScanner, and all translated strings will be loaded from the language file.
    If you want to run NetBScanner without the translation, simply rename the language file, or move it to another folder.

License

This utility is released as freeware. You are allowed to freely distribute this utility via floppy disk, CD-ROM, Internet, or in any other way, as long as you don't charge anything for this and you don'tsell it or distribute it as a part of commercial product. If you distribute this utility, you must include all files inthe distribution package, without any modification !

Disclaimer

The software is provided "AS IS" without any warranty, either expressed or implied,including, but not limited to, the implied warranties of merchantability and fitnessfor a particular purpose. The author will not be liable for any special, incidental,consequential or indirect damages due to loss of data or any other reason.

Feedback

If you have any problem, suggestion, comment, or you found a bug in my utility, you can send a message to nirsofer@yahoo.com

Download NetBScanner

NetBScanner is also available in other languages. In order to change the language of NetBScanner, download the appropriate language zip file, extract the 'netbscanner_lng.ini', and put it in the same folder that you Installed NetBScanner utility.

LanguageTranslated ByDateVersion
Arabic Thamir Alawwad25/02/20131.06
Brazilian PortugueseSoftDownload08/05/20121.00
DutchJan Verheijen16/10/20161.11
Frenchpapoo31/12/20151.10
German«Latino» auf WinTotal.de14/10/20161.11
Greekgeogeo.gr12/05/20121.00
HungarianTiminoun12/12/20221.11
PersianDinoTechno19/03/20221.11
RomanianJaff (Oprea Nicolae)03/02/20161.10
Romanian VJaff (Oprea Nicolae)08/03/20141.08
RussianDmitry Yerokhin26/01/20131.06
Simplified ChineseGalaxy Lyu26/04/20171.11
SlovakFrantišek Fico09/02/20171.11
SpanishCX2SA13/05/20121.00
Traditional ChineseDanfong Hsieh26/10/20161.11
Thaiน้องพร WiFi ค่ะ31/07/20131.06
TurkishAhmet Kırali03/10/20161.10
NetBScanner - NetBIOS scanner (2024)

FAQs

What is NetBIOS scanner? ›

Description. NetBScanner is a network scanner tool that scans all computers in the IP addresses range you choose, using NetBIOS protocol.

Is NetBIOS a port scanner? ›

NetBIOS is an example of a port scanner.

What is an NBT scan? ›

nbtscan-unixwiz is a command-line tool that scans for open NETBIOS nameservers on a local or remote TCP/IP network. Unlike the original version of nbtscan, this version can scan multiples IPs at a time. Scan targets can be single IPs, CIDR notation, ranges, hostnames, or a combination thereof. --:----:--

How to use netscan? ›

Using Netscan to Scan the Network
  1. Log in to Neurons for ITSM as a Discovery Manager.
  2. Open the Gateway workspace and select a gateway from the list (if there is more than one). ...
  3. From the Netscan IP-Ranges tab, click New IP-Range. ...
  4. Enter the information for the range of IP addresses you want to scan. ...
  5. Click Save.

What services use NetBIOS? ›

NETBIOS is an application programming interface (API) that operates at the session layer (Layer 5) of the OSI (Open Systems Interconnection) model. It provides various services, such as name service, datagram service, and session service, to facilitate communication between devices on a network.

Is NetBIOS a security risk? ›

Why is it a risk? Using a command called NBSTAT (link below), an attacker can discover computer names, IP addresses, NetBIOS names, Windows Internet Name Service (WINS) names, session information and user IDs. This information can be used to mount focussed attacks on administrative accounts.

What are the risks of NetBIOS? ›

NetBIOS Name Service (NBNS) Spoofing: Attackers can spoof NetBIOS Name Service (NBNS) responses to redirect network traffic to malicious systems. This can lead to various attacks, such as Man-in-the-Middle (MITM) attacks and session hijacking.

What ports are associated with NetBIOS? ›

NetBIOS provides three distinct services:
  • Name service for name registration and resolution (ports: 137/udp and 137/tcp)
  • Datagram distribution service for connectionless communication (port: 138/udp)
  • Session service for connection-oriented communication (port: 139/tcp)

How does NetBIOS identify a computer system on the network? ›

In modern networks, NetBIOS normally runs over TCP/IP via the NetBIOS over TCP/IP (NBT) protocol. This results in each computer in the network having both an IP address and a NetBIOS name corresponding to a (possibly different) host name. NetBIOS is also used for identifying system names in TCP/IP (Windows).

Which of the following is a utility for enumerating NetBIOS shares? ›

Netstat is a utility for obtaining protocol statistics, NetBIOS name table, name cache information and current TCP/IP connections over NBT (NetBIOS over TCP/IP), assisting in the resolution of NetBIOS name resolution issues.

How do I scan a private network? ›

To rapidly scan a network yourself using native operating system (OS) capabilities, follow these steps.
  1. Open the command prompt.
  2. Enter the command “ipconfig” for Mac or “ifconfig” on Linux. ...
  3. Next, input the command “arp -a”. ...
  4. Optional: Input the command “ping -t”.
Jan 4, 2023

How do I scan a network to find devices? ›

How to manually identify unknown devices on a network
  1. Open the Command prompt or Terminal in your Windows, Linux, or macOS system.
  2. Search all the network settings, such as default gateway and IP address, through the command prompt.
  3. Type the command "arp -a" to view the list of all IP addresses connected to your network.

How to run port scan on Windows? ›

How to check for open ports on Windows
  1. Open the Command Prompt. ...
  2. Type “netstat -aon” and hit enter.
  3. Look for the port numbers in the LISTening state. ...
  4. If the port numbers aren't in the LISTening state, you'll need to open them manually.
Aug 17, 2022

Should NetBIOS be enabled? ›

Enabling NetBios might help an attackers access shared directories, files and also gain sensitive information such as computer name, domain, or workgroup.

Why is NetBIOS on my Mac? ›

When making outbound connections to servers, SMB 1 and NetBIOS are enabled by default in macOS to improve compatibility with third-party products. macOS will attempt to use the later versions of SMB, as well as DNS and port 445, with failover to port 139 and SMB 1 as needed.

What is NetBIOS in simple terms? ›

NetBIOS (/ˈnɛtbaɪɒs/) is an acronym for Network Basic Input/Output System. It provides services related to the session layer of the OSI model allowing applications on separate computers to communicate over a local area network. As strictly an API, NetBIOS is not a networking protocol.

What happens if you turn off NetBIOS? ›

Programs and services that depend on NetBIOS no longer work after you turn off NetBT services, so it's important that you verify that your clients and programs no longer require NetBIOS support before you turn it off.

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