anyone know why enabling IPv6 on the LAN breaks Disney+, Netflix & Amazon Music

[a417]

Been on OPNsense for about two months, pfSense, debian BYO, IPcop, IPfire,etc...for almost 2 decades now.

One thing I can't figure out, and it's reproducible to me (but I can never find corresponding log issues or other indications)...but if I enable IPv6 on my LAN, streaming services will work for about a day - and then they will start to fail w/o an error on the firewall end.  No errors in the logs, diagnostics don't appear to show anything, just a silent death...

This is purpose-built edge device, ECC ram, fully BSD-Supported NICs, the works...so i'm fairly confident it's not some intermittent hardware issue.  I've wirecaptured plenty of logs for the offending devices (Amazon Fire TVs of almost every generation) and on the IPv4 side everything looks good.  No TTL issues, no dropped packets, no routing issues, nothing abnormal.  On IPv6, it works...until it doesn't.  Usually between 18 & 24 hours.  A reboot makes it work again.

This problem really became noticable on the pfSense install that I ran for 5 years, and I never mentally tied it in to the IPv6 services on the LAN.  When I migrated over the OPNSense, and really did it right with supported hardware, etc, I thought it was odd that the same problem I chased on pfSense resurfaced. 

I don't need IPv6 on the LAN right now, but what am I missing? 

[franco]

I'd start with

https://test-ipv6.com
https://ipv6-test.com

And see what it complains about.


Cheers,
Franco

[a417]

Thanks franco, apparently my WANs IPv6 connection that should work...doesn't!.  Disabling IPv6 support on the LAN and removing the IPv6 WAN support eliminates that issue.

...Now that's sorted, why?  Why would it work for 18 to 24 hours and then just...not?

[franco]

It's unclear what the issue is and what scores you got on the pages having IPv6 enabled.

It could be as simple as suboptimal DNS resolution or policy rules problem, ISP getting in the way somehow (which IPv6 type?), etc.

There is a also an issue with renew of IP addresses through DHCP4/6 on 23.1 at the moment that could be a factor (but not judging by the list given on your end of other distributions used -- or did they not have the issue?).


Cheers,
Franco

[a417]

0/10 and 3/20. 

Thanks for your help!

[franco]

Ok, that's possibly the lowest score you can get... which begs the question... which ISP, which method of IPv6 connectivity?

Keep in mind some ISPs roll out defunct IPv6 support and this coupled with IPv6 DNS resolution would cause clients to not work because they think they have a valid connection while they haven't.


Cheers,
Franco

[Karllito]

It sounds like you've got some serious networking experience. I can't say I have a surefire solution, but it's definitely a puzzling issue. Perhaps there are some quirks in IPv6 settings or how it interacts with your devices. Maybe someone here has a workaround. Also, you may find a guide to solve it here: https://onlinetvcast.com/guides/how-to-watch-fubotv-in-mexico. Good luck!