What does the "Disable IPv6 Transition Tunnels" tweak change in Windows?

It runs cmd /c netsh interface teredo set state disabled and 2 more commands. The full list is in the table on this page, read from the app's source.

Is "Disable IPv6 Transition Tunnels" safe to switch on?

Safe for most PCs. Skip it if you use Xbox party chat or Game Pass multiplayer. The main cost: Xbox networking on Windows uses Teredo for party chat and multiplayer on some connections. If the Xbox app reports a blocked Teredo or strict NAT, switch this off.

Is "Disable IPv6 Transition Tunnels" free in Frozen Tweaks?

It is part of Frozen Pro and Elite. You can also make the change by hand with the values on this page.

Disable Teredo, ISATAP and 6to4: the IPv6 transition tunnels in Windows

Frost LIVENetworkProUndo: YesUpdated Oct 8, 2026View as Markdown

Short answer

Updated Oct 8, 2026

Teredo, ISATAP and 6to4 are tunnels that carry IPv6 over an IPv4 network. They date from the early days of IPv6. This tweak sets all three to disabled with netsh. It runs cmd /c netsh interface teredo set state disabled and 2 more commands.

In the app

Disable IPv6 Transition TunnelsPRO

Command

cmd /c netsh interface teredo set state defaultcmd /c netsh interface teredo set state disabled

What the switch writes. Your current value may differ. 2 more changes below.

What it does

Teredo, ISATAP and 6to4 are tunnels that carry IPv6 over an IPv4 network. They date from the early days of IPv6. This tweak sets all three to disabled with netsh.

In the app the switch is called "Disable IPv6 Transition Tunnels", described there as: Disables Teredo/ISATAP/6to4 which can add background routing noise.

When it helps, and when it hurts

When it helps

Removing tunnel adapters that nothing on a modern network needs, along with their background traffic.

When it hurts

Xbox networking on Windows uses Teredo for party chat and multiplayer on some connections. If the Xbox app reports a blocked Teredo or strict NAT, switch this off.

What it writes

Exactly what the switch changes, read from the app's source. Switching it off is what the app writes when you turn the tweak off again.

With the tweak · CMD

cmd /c netsh interface teredo set state disabled
cmd /c netsh interface isatap set state disabled
cmd /c netsh interface 6to4 set state disabled

Switching it off · CMD

cmd /c netsh interface teredo set state default
cmd /c netsh interface isatap set state default
cmd /c netsh interface 6to4 set state default

From the app's source (ipv6_transition_off.hpp), app 2.0.0, checked Oct 8, 2026.

How to undo it

In the app: Yes

Switching it off sets a standard Windows value, which may not be exactly how you had it.

Switch the tweak off in Frozen Tweaks. It runs the commands shown under "Switching it off".

Changing several settings at once? The app's Make a restore point button, on every plan, makes a Windows restore point before you start.

Verdict

Safe for most PCs. Skip it if you use Xbox party chat or Game Pass multiplayer.

Questions

What does the "Disable IPv6 Transition Tunnels" tweak change in Windows?: It runs cmd /c netsh interface teredo set state disabled and 2 more commands. The full list is in the table on this page, read from the app's source.
Is "Disable IPv6 Transition Tunnels" safe to switch on?: Safe for most PCs. Skip it if you use Xbox party chat or Game Pass multiplayer. The main cost: Xbox networking on Windows uses Teredo for party chat and multiplayer on some connections. If the Xbox app reports a blocked Teredo or strict NAT, switch this off.
How do I undo it?: Switch the tweak off in Frozen Tweaks. Switching it off sets a standard Windows value, which may not be exactly how you had it.
Is "Disable IPv6 Transition Tunnels" free in Frozen Tweaks?: It is part of Frozen Pro and Elite. You can also make the change by hand with the values on this page.

In the app