NBT-NS Poisoning Possible

Table of Contents

• Option 1: Disable via DHCP
• Option 2: Disable via Specific Host

Option 1: Disable via DHCP

1. Log on to the server providing DHCP to the environment and open the DHCP Management interface by running: dhcpmgmt.msc
2. Navigate to the Server Options within your domain, right-click and select Configure Options...
   
3. Select the Advanced tab, select the Microsoft Windows 2000 Options, select 001 Microsoft Disable Netbios Option, change the value to 0x2, and select Ok.
   

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Option 2: Disable on Specific Host

1. Log on to the host and open the Network and Sharing Center by searching or right-clicking the Network icon in the bottom right and selecting Open Network and Sharing Center.
   
2. Click Change adapter settings.
   
3. Right-click on the interface and select Properties.
   
4. Select Internet Protocol Version 4 (TCP/IPv4) and click on Properties.
   
5. On the General tab click the Advanced button and navigate to the WINS tab, then select Disable NetBIOS over TCP/IP and select Ok.