[jcifs] nbtscan and mac addresses

Eric Glass eric.glass at gmail.com
Wed Aug 4 17:02:15 GMT 2004

> Is there a way to obtain the IP and MAC
> address with jcifs as well?

This should work; it will print the host's NetBIOS names/IP and MAC
address (if available):

import jcifs.netbios.NbtAddress;

public class NbtProbe {

    public static void main(String[] args) throws Exception {
        NbtAddress[] addresses = NbtAddress.getAllByAddress(args[0]);
        System.out.println("NetBIOS Names:");
        for (int i = addresses.length - 1; i >= 0; i--) {
            System.out.println("    " + addresses[i]);
        byte[] mac = NbtAddress.getByName(args[0]).getMacAddress();
        if (mac != null) {
            StringBuffer hex = new StringBuffer("0x");
            for (int i = 0; i < mac.length; i++) {
                hex.append(Integer.toHexString((mac[i] >> 4) & 0x0f));
                hex.append(Integer.toHexString(mac[i] & 0x0f));
            System.out.println("MAC Address: " + hex);


Note that you may have to configure some of the jCIFS properties;
specifically, to reach hosts on another subnet you'll need to specify
the IP address of a WINS server in "jcifs.netbios.wins".

On a semi-related note, NbtAddress.getHostName() appears to return the
"unclean" name (i.e., getHostName() returns "hostName.name" while
toString() returns "hostName.toString()").  Didn't know if that was
intentional or not.


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