Category: IPv6

Internet DNS with built-in IPv6+IPv4 blacklisting:
article #1473, updated 775 days ago

Something new. is doing this, and it appears both very fast and very worthwhile. Same feature space as and, adding bad-actor blacklisting in both IPv6 and IPv4 in its default. This is the first real IPv6-enabled security service of which I am aware, I have been watching and waiting for this for quite a while.

Uses primary, secondary

There are other features too.



Set Windows to Prefer IPv4 over IPv6 (when Microsoft v6 networking goes haywire)
article #1432, updated 1018 days ago

Sometimes IPv6 networking goes haywire, on a PC, server, or even a whole network. Machines are there, ping may happen or not, but one, some, or all of them just insist on using oddball IPv6 IPs to connect to each other, even though nothing has been changed voluntarily. Given that even after all these years there still are no useful IPv6 blacklists on the Internet, and given the excellent methods in place to use IPv4, we see no need for IPv6 at this time.

But Microsoft does insist on using IPv6 inside its operating systems, so we must keep it running; disabling v6 does harm in a Microsoft environment. The following is Microsoft’s recommendation to instruct Windows to prefer IPv4, which does eliminate the above issue. One adds a DWORD here:


named DisabledComponents. Hex value 20, binary 32. Then reboot.

A quick way to do the registry add, in administrative CMD:

REG ADD HKLM\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters /v DisabledComponents /t REG_DWORD  /d 32

Still you’ll need to reboot to get it to take effect.

The info is from this reference.



Create a Private IPv6 Subnet
article #1179, updated 2236 days ago

This site creates a new one for you by random generation, as is the recommended standard: