IPV6 only home network bliss closer by year-end! (except for IOT)

[Gimli_]

By the end of the year we should have support for 464XLAT (CLAT) in:

- IOS and Android phones have supported this for a long time.
- Mac Os has had support since 2002
- Windows 11 estimated general availability end of 2026 - Link
- Linux support just dropped in Network Manager 1.58 and should be in Ubuntu by end of 2026 - Link

What does this mean in practical terms?
- My home VLAN can be switched to an IPv6 only network.
- All mobiles and desktop/laptop devices.
- My OMV backup server is Debian based so I am pretty sure it will be happy with IPv6 only.
- My home services are mostly on Truenas (file server, jellyfin, immich, homeassistant, unifiOS etc) will need to see if that can migrate to IPv6 only (I have my doubts)

- My IOT VLAN will remain dual stack for the foreseeable future, unfortunately. I will leave it configured with dhcp option 108.
- Some devices like chromecast and google home speakers can already work on IPv6 only.
- Home plugs and switches are fairly simple to replace.
- Some devices are simple to make IPv6 only e.g. a volumio streaming device, esp32 bluetooth proxy device and so on.
- Other IPv4 only appliances unfortunately will be with me for a long time e.g. my inverters, fridge/freezer, my beloved Roberts iStream3 radio etc.

- My Guest VLAN can change to v6 only, normally only laptops and mobiles connect.

- My management VLAN (for unifiOS, unifi switch, unifi access points) .... I will have to test that, not sure if they will be able to work on IPv6 only network. I use a Opnsense router, so no unifi cloud gateway. [EDIT: This is a fail, unifi still require IPv4]

- My DMZ VLAN is IPv6 only, only running a btc node. Zero IPv4.

My Opnsene router is currently configured as an IPv6 mostly network meaning:
- Dualstack IPv4 and IPv6.
- NAT64 on the WAN, and DNS64 activated on the Unbound DNS.
- Pref64 parameter set in the RouterAdvertisement
- DHCP4 Option 108 set to indicate IPv6 prefered.

- Only the phones respect the request to disable their IPv4 network stacks, and to be honest I have not had ANY issues on them.


Anyone else trying to push the IPv6 only envelope at home? Any advice? How do you configure firewall rules, do you have a static IPv6 PD?

 

[TheOracle]

By the end of the year we should have support for 464XLAT (CLAT) in:

- IOS and Android phones have supported this for a long time.
- Mac Os has had support since 2002
- Windows 11 estimated general availability end of 2026 - Link
- Linux support just dropped in Network Manager 1.58 and should be in Ubuntu by end of 2026 - Link

What does this mean in practical terms?
- My home VLAN can be switched to an IPv6 only network.
- All mobiles and desktop/laptop devices.
- My OMV backup server is Debian based so I am pretty sure it will be happy with IPv6 only.
- My home services are mostly on Truenas (file server, jellyfin, immich, homeassistant, unifiOS etc) will need to see if that can migrate to IPv6 only (I have my doubts)

- My IOT VLAN will remain dual stack for the foreseeable future, unfortunately. I will leave it configured with dhcp option 108.
- Some devices like chromecast and google home speakers can already work on IPv6 only.
- Home plugs and switches are fairly simple to replace.
- Some devices are simple to make IPv6 only e.g. a volumio streaming device, esp32 bluetooth proxy device and so on.
- Other IPv4 only appliances unfortunately will be with me for a long time e.g. my inverters, fridge/freezer, my beloved Roberts iStream3 radio etc.

- My Guest VLAN can change, normally only laptops and mobiles connect.

- My management VLAN (for unifiOS, unifi switch, unifi access points) .... I will have to test that, not sure if they will be able to work on IPv6 only network. I use a Opnsense router, so no unifi cloud gateway.

- My DMZ VLAN is IPv6 only, only running a btc node. Zero IPv4.

My Opnsene router is currently configured as an IPv6 mostly network meaning:
- Dualstack IPv4 and IPv6.
- NAT64 on the WAN, and DNS64 activated on the Unbound DNS.
- Pref64 parameter set in the RouterAdvertisement
- DHCP4 Option 108 set to indicate IPv6 prefered.

- Only the phones respect the request to disable their IPv4 network stacks, and to be honest I have not had ANY issues on them.


Anyone else trying to push the IPv6 only envelope at home? Any advice? How do you configure firewall rules, do you have a static IPv6 PD?

Finally some proper IPv6-only progress!

464XLAT landing on Win11 and Linux by end of year is huge. Once that hits, the “everything still needs dual-stack” excuse dies hard for most normal devices.

IoT remaining the stubborn hold-out is so classic though. Those random Chinese sensors and old white goods will still be clinging to IPv4 in 2035 at this rate.

Curious how the Unifi management VLAN behaves for you once you try pure IPv6… that one’s always a bit of a wildcard.

You running a static PD from your ISP or just relying on the dynamic prefix?

 

[Mzezman]

Finally some proper IPv6-only progress!

464XLAT landing on Win11 and Linux by end of year is huge. Once that hits, the “everything still needs dual-stack” excuse dies hard for most normal devices.

IoT remaining the stubborn hold-out is so classic though. Those random Chinese sensors and old white goods will still be clinging to IPv4 in 2035 at this rate.

Curious how the Unifi management VLAN behaves for you once you try pure IPv6… that one’s always a bit of a wildcard.

You running a static PD from your ISP or just relying on the dynamic prefix?

Just checked now and it doesn't give you the option to turn IPV4 off

 

[Gimli_]

Finally some proper IPv6-only progress!

464XLAT landing on Win11 and Linux by end of year is huge. Once that hits, the “everything still needs dual-stack” excuse dies hard for most normal devices.

IoT remaining the stubborn hold-out is so classic though. Those random Chinese sensors and old white goods will still be clinging to IPv4 in 2035 at this rate.

Curious how the Unifi management VLAN behaves for you once you try pure IPv6… that one’s always a bit of a wildcard.

You running a static PD from your ISP or just relying on the dynamic prefix?

This is a long term process, step by step. I have not tried putting them on IPv6 only for the fear of having to adopt all of the AP's again but I can see that they do take a ULA from my router. Time will tell, I'll report back here when I try it.

 

[Gimli_]

Just checked now and it doesn't give you the option to turn IPV4 off

If all NAT64 and DNS64 is present and your device recognizes it, and it has a CLAT, then it will request your DHCP4 server for option 108, if the router replies with 108 (IPv6 prefered) then your device will disable it's own IPv4 stack for a set period of time (this is if it is on a dual stack netowrk). If there is no IPv4 at all on the network, your device will activate it's CLAT as well. CLAT is just there to deal with those pesky ipv4 literal ip addresses that is not resolved from a domain name by the DNS64.

Not sure where you checked?

 

[Mzezman]

If all NAT64 and DNS64 is present and your device recognizes it, and it has a CLAT, then it will request your DHCP4 server for option 108, if the router replies with 108 (IPv6 prefered) then your device will disable it's own IPv4 stack for a set period of time (this is if it is on a dual stack netowrk). If there is no IPv4 at all on the network, your device will activate it's CLAT as well. CLAT is just there to deal with those pesky ipv4 literal ip addresses that is not resolved from a domain name by the DNS64.

Not sure where you checked?

Maybe i checked the wrong place but when you setup a new network (vlan) in the UI it does not give you the option to turn off IPv4

 

[Gimli_]

Maybe i checked the wrong place but when you setup a new network (vlan) in the UI it does not give you the option to turn off IPv4

Ok are you talking about the Unifi Cloud gateway/ Unifi Network? I am using Opnsense as my router and selfhosted UnifiOS to manage the switch and AP's only. So a bit of a different story. I can make the VLAN interface IPv6 only, no problem. On my network they are all on a dualstack netowork and as I said they get a ULA address at the moment. I'll turn off IPv4 this weekend and see what happens

 

[Mzezman]

Ok are you talking about the Unifi Cloud gateway/ Unifi Network? I am using Opnsense as my router and selfhosted UnifiOS to manage the switch and AP's only. So a bit of a different story. I can make the VLAN interface IPv6 only, no problem. On my network they are all on a dualstack netowork and as I said they get a ULA address at the moment. I'll turn off IPv4 this weekend and see what happens

Ah ok - so we were speaking across purposes. Keen to hear how it works in your environment

 

[repitah]

Mind making a map/diagram of how you implemented (without personal IP ranges; Range A-Z and prefix [random private])?
Draw.io is useful for that stuff.

I want to do the same at home so I can slowly implement at an enterprise level, but so backlogged with home projects (eyes the OpenWRT SBC router upgrade, switch and APs sitting in the study). IPv4 is old hat and pretty easy, but the convenience factor is just an excuse to stall even longer.

I applaud your effort

 

[Herr der Verboten]

/rolleyes

 

[Gimli_]

Ah ok - so we were speaking across purposes. Keen to hear how it works in your environment

Ok, bad idea. I yanked the ipv4 network out of my network management vlan and basically locked myself out of my whole network. I struggled till now to get it back.

So the verdict is: UnifiOS, switches and access points can pass on IPv6 traffic to client devices, but absolutely needs IPv4 to be able to operate. It is not ready for IPv6 only itself.