topic Re: FYI : IPv6 Prevented VPN Connection in Broadband

FYI : IPv6 Prevented VPN Connection

Anvil_Iron — Fri, 07 Jul 2023 08:46:10 GMT

My wife uses VPN for work and one day she wasn't able to connect. I checked the router (Zyxel NR5103E) web-config and noticed the Primary/Secondary DNSv6 server addresses info were present which weren't before.

I tried disabling IPv6 in the WAN and LAN settings but internet service stopped.

I then enabled manual APN mode and changed from 3internet to Three.co.uk and restarted the router. After restart, the IPv6 info was N/A and the VPN was able to connect. VPN also connected when APN was set to 3internet with manual APN enabled.

The strange thing was when APN Manual Mode was disabled and router reset, IPv6 info was displayed. It looks like the router was obtaining IPv6 and IPv4 info from Three if manual APN mode is disabled. This could be the PDP Type being set to IPv4/IPv6 automatically by Three where as in manual APN mode, I have it set to IPv4 only.

Re: FYI : IPv6 Prevented VPN Connection

JonathanB — Fri, 07 Jul 2023 09:46:32 GMT

Thanks for sharing this @Anvil_Iron, I'll pass the feedback on.

Re: FYI : IPv6 Prevented VPN Connection

JonathanB — Fri, 07 Jul 2023 10:50:52 GMT

We're also looking into some issues with connecting to some VPN services in general. I'm not sure this is necessarily the same problem, but can you let me know which VPN provider she was having difficulties connecting to?

Re: FYI : IPv6 Prevented VPN Connection

Anvil_Iron — Fri, 07 Jul 2023 11:15:28 GMT

Hi Jonathan, It's GlobalProtect by Palo Alto Networks.

Re: FYI : IPv6 Prevented VPN Connection

bhavinnp — Sun, 09 Jul 2023 15:55:35 GMT

Hi Guys,

Thanks Anvil_Iron , this fixed my issues since the update of the new firmware. I had Major issues with wired LAN devices. My Eufy, Philips Hue and wifi mesh APs all stopped working. I wasn’t sure what what was the issues as my setup is complex. I noticed that wired devices didn’t all get ip addresses from dhcp, had to manually setup an ip on wifi mesh for the disc to connect. Was wired as even directly connecting the some devices to the Lan port didn’t work but a laptop did. I also noticed a lag on my vpn for work (Meraki teleworker device). The Nintendo Switch didn’t want to connect to Wi-Fi.

Re: FYI : IPv6 Prevented VPN Connection

zoobill — Tue, 11 Jul 2023 11:01:46 GMT

Thanks for posting this fix!

I only realized that my router firmware had been upgraded when my wifi printer became inaccessible and the network map section of my pc audit software (Belarc Advisor) output had become blank!

I used your method to disable IPv6 and now I can see my home network again. Many thanks!

Re: FYI : IPv6 Prevented VPN Connection

NG — Mon, 17 Jul 2023 12:11:20 GMT

For the ignorant among us (me), could you please detail how to set APN (whatever that is) to manual and how to disable IPv6? I assume only from the desktop app, not the phone app. On the desktop, currently under System Info, the WAN and LAN IPv6 shows as empty but I don't know how to change the 2 settings... Many thanks in advance!

Re: FYI : IPv6 Prevented VPN Connection

NG — Mon, 17 Jul 2023 12:55:25 GMT

Update: Anvil_Iron is the man!!!

To add a little detail to help the more ignorant like me:

First, log in to the hub from a browser ideally on your laptop (or I guess phone), not the hub app. (ie, 192.168.1.1/login, logging in as admin)

1) under top-right burger menu-->Network Settings-->Broadband-->Cellular APN, I set to manual so it ended up as follows:

And under Burger menu-->Network Settings-->Home Networking-->Lan Setup, click on the 1st APN setting in the list (on the right-hand side where you click to edit), then

I then rebooted the hub, confirmed settings remained as above, and rebooted my devices (including network switch). Audio player and speaker when connected to my network switch do show up on hub app both under Wi-Fi and LAN as expected.

... AND I'M NOW LISTENING TO MY PINK FLOYD ALBUM ONCE AGAIN!!!!!

Thanks again Anvil_iron!!

Re: FYI : IPv6 Prevented VPN Connection

JonathanB — Mon, 17 Jul 2023 14:08:11 GMT

Thanks @NG, I'm sure the step by step and screenshots will be really helpful for other community members. 🙂

Re: FYI : IPv6 Prevented VPN Connection

4l3x5pr1n63r — Wed, 19 Jul 2023 13:06:56 GMT

Just wanted to add that I've had the same problem since last Friday (all home networking lost) and that @Anvil_Iron solution solved it immediately. Very greatful.

@JonathanB hopefully the more people that express this problem, something can actually be fed back to the right team at Three, it's very frustrating that something like this can happen.

Re: FYI : IPv6 Prevented VPN Connection

JCFromBerks — Wed, 19 Jul 2023 20:40:14 GMT

Just +1 to this that disabling the IPv6 as detailed above fixed networking issues for me also. So second the motion that this hopefully influences the developers to fix once and for all.

Re: FYI : IPv6 Prevented VPN Connection

neillch1 — Sun, 23 Jul 2023 17:09:08 GMT

Hi i had problems with sky q and sonos and i followed your instructions and now all is working thanks for the information its been really helpful which is a lot more than i could say about the three technical support phone service they told me it was sky and sonos problems not threes!!!

Re: FYI : IPv6 Prevented VPN Connection

AndrewM — Mon, 24 Jul 2023 16:27:35 GMT

I can confirm this also worked for me - no need to change to IP6, just use the Three5GBroadband app to switch it over to Three.co.uk from 3internet. It’s also saved issues on my phone’s personal hotspot.

Re: FYI : IPv6 Prevented VPN Connection

JimJam — Sat, 05 Aug 2023 17:20:18 GMT

I had the same problem, y personal devices worked fine but unable to connect my work devices. I thought it was down to the time and date not being correct on the hub (and it would not update via the servers). I applied the above changes and work devices not working. Time has also updated on the hub 😉

Re: FYI : IPv6 Prevented VPN Connection

JonathanB — Mon, 07 Aug 2023 16:24:38 GMT

Hey @JimJam,

Sorry not sure if there's a typo in your post. Are you saying that the devices are "not" working or "now" working after trying this?

Thanks,
Jonathan

Re: FYI : IPv6 Prevented VPN Connection

MarmiteLlama — Fri, 11 Aug 2023 16:06:58 GMT

Hi all,

Thank you so much @Anvil_Iron, as well as @JonathanB, and @Kevwelhamster.

The Three technical team ran me in circles getting a new router and new sim for this issue, declared their troubleshooting done, and did not solve anything. It is so unacceptable that they cannot offer any actual technical support and that the community are left to deal with issues that they cause with their systems.

Re: FYI : IPv6 Prevented VPN Connection

NT — Sun, 13 Aug 2023 14:44:52 GMT

Thank you! This also fixed my Hitachi TV & Amazon Firestick connectibity issues with teh same router & firmware version as yours!

Re: FYI : IPv6 Prevented VPN Connection

456 — Tue, 22 Aug 2023 09:39:30 GMT

Ok, HUGE issues here as well. All of a sudden, half of my devices WOULD NOT CONNECT to the internet. It seems that the issues stems from the router starting to assign ipv6 addresses to all the connected devices, instead of ipv4.

I was able to get all the devices re-connected by following the instructions from this thread.

HOWEVER - my speeds have now dropped from 500+megs to 100megs. Is there a way for the router itself to use ipv6 to connect to Three but for all my home devices to use ipv4 to connect to the router? 🙏

Re: FYI : IPv6 Prevented VPN Connection

dguru — Thu, 24 Aug 2023 10:22:42 GMT

Thanks @Anvil_Iron . It didnt work for me unfortunately..

Re: FYI : IPv6 Prevented VPN Connection

CSmithyPx — Mon, 28 Aug 2023 09:30:00 GMT

I just created an account to say thank you so much! I went back to using my 5g CPE PRO which is way way slower and is almost unusable now for some reason.
But this allowed me to go back to the router I got with the contract. Life saver