True.

All somebody has to do is grep "::" some logs somewhere for millions of hosts then | uniq to remove dupliaces > to some file and then there's their master host list.

for all we know, bad actors could be positioning themselves right now. But for hosts that need ipv6 and have no ipv4 uplinks it's not like they can just disable their internet. They can, but they won't.

Cisco just laid off a major amount of their workforce too so, so should be interesting to watch.

Disable IPv6 on All Network Adapters

    Open PowerShell as Administrator:
        Right-click on the Start menu or press Windows Key + X.
        Select Windows PowerShell (Admin) or Windows Terminal (Admin) if using a newer version of Windows.
    Disable IPv6 on All Network Adapters:Execute the following command in PowerShell:

Get-NetAdapter | ForEach-Object { Disable-NetAdapterBinding -Name $_.Name -ComponentID ms_tcpip6 -PassThru }

    Explanation:
        Get-NetAdapter: Retrieves all network adapters.
        ForEach-Object { ... }: Iterates through each network adapter.
        Disable-NetAdapterBinding: Disables the IPv6 binding for the specified network adapter.
        -ComponentID ms_tcpip6: Specifies the IPv6 protocol to disable.

Disable IPv6 Globally

If you want to disable IPv6 globally (not just on network adapters), you can use the Windows Registry to achieve this. Here’s how:

    Open PowerShell as Administrator:
        Same steps as above.
    Disable IPv6 Globally:Execute the following commands to modify the Windows Registry:

# Disable IPv6 on all network interfaces Set-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters' -Name 'DisabledComponents' -Value 0xFF

# Apply the changes by restarting the network interface or rebooting the system Restart-NetAdapter -Name (Get-NetAdapter | Select-Object -First 1).Name

Explanation:

    Set-ItemProperty: Modifies a registry key value. In this case, it sets the DisabledComponents value to 0xFF, which disables all IPv6 components.
    Restart-NetAdapter: Restarts the network adapter to apply changes. If this doesn’t work, a system reboot may be required.

Verify IPv6 Status

To check if IPv6 has been disabled, you can run:

Get-NetAdapterBinding -ComponentID ms_tcpip6

This command will list network adapters and show whether the IPv6 binding is enabled or disabled. Re-enable IPv6

If you want to re-enable IPv6, you can run:

Get-NetAdapter | ForEach-Object { Enable-NetAdapterBinding -Name $_.Name -ComponentID ms_tcpip6 -PassThru }

Important Notes

    Administrative Privileges: Disabling network features typically requires administrative rights.
    Network Impact: Disabling IPv6 might affect certain network functionalities or applications that rely on it, so be sure that it’s necessary for your use case.
    Reboot: Some changes might require a reboot to take full effect.

By following these steps, you can disable IPv6 on your Windows system using PowerShell.