Protecting from LLMNR and NBT-NS Poisoning Using Responder

Per information here : , in a Pentest you might fail this unless you do the below

  • Disabling LLMNR:
    • Open the Group Policy Editor in your version of Windows
    • Navigate to Local Computer Policy > Computer Configuration > Administrative Templates > Network > DNS Client
    • Under DNS Client, make sure that “Turn OFF Multicast Name Resolution” is set to Enabled
  • Netbios over TCPIP disabled
    • DHCP option “001 Microsoft Disable Netbios Option” configured for all scopes with value of 0x2
    • NetbiosOptions value changed to 2 in registry for all interfaces with PS script
    • LLMNR disabled using GPO
    • Configured Secure only dynamic updates for all DNS zones
  • WPAD
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Tags: DNS, LLMNR, NBT-NS, pentest, Poisoning, Turn OFF Multicast Name Resolution, WPAD

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