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IPv6 broken

dms

I run a UTM and have had stable, native ipv6 across 3 internal vlans for quite some time. However, after some of the recent firmware updates, the UTM now refuses to connect the wan interface via ipv6. Nothing else has changed, my utm config has been stable for some time, but after any reconnection of the wan interface for any reason (manual reconnect, reboot, reboot after firmware update, ISP blip, etc) I lose all internet connectivity.

Looking at my interfaces, all Lan interfaces show ipv6 addresses correctly but the wan interface simply won't pick up its address....to the point where the interface is shown as DOWN and there is no connectivity whatsoever across ipv6 or ipv4.

A combination of black magic, wearing yellow underpants and chanting seems to bring it back....seriously it's some unknown combination of forcing the connection to reset, rebooting the UTM and disabling/enabling ipv6 will bring it back. But only until the connection resets and then boom, no internet again.

I've been forced to disable ipv6 permanently on my network because this is a massive issue. Other similar sounding posts talk about having to rebuild the wan interface but that's a massive job, isn't it?

Does anyone have any suggestions? Should I start from scratch, clean install UTM and then reload my current config or will that not help? Any help would be appreciated as it's a real pain as it currently stands.



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  • 0

    Great updates, glad to see it's not just me! Am I right in reading that all versions of Sophos home software doesn't do PPPoE based IPv6 anymore....i.e. it's broken on UTM and XG? I was toying with the idea of upgrading to the XG but if it doesn't work there either then there's not much point.

  • 0 in reply to dms

    Hi,

    there is no difference between the home use and the commercial software there are both installed from an ISO. The difference being in what the home licence allows you to do.

    IPv6 was working for me before I changed the hardware to run the beta XG and now having rebuilt the UTM twice I cannot get the PPPoE IPv6 to pass traffic. I mean it does not pass either 4 or 6 and nothing shows in the logs that I can see other than large quantities of DNS requests.

     

    @Ben, are you using NAT for your IPv6 on PPPoE?

     

    Ian

    XG115W - v20.0.1 MR-1 - Home

    XG on VM 8 - v20 GA

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    Same here. I've been playing this morning and the only way I can now get IPv6 working is to drop my modem back into router mode and double NAT IPv4 and NAT IPv6, which is far from ideal. Enabling IPv6 via the UTM just hangs my WAN connection and I get no link out to the internet across IPv4 or IPv6. That properly sucks given that it all used to work perfectly; I'm massively disappointed.

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  • 0 in reply to rfcat_vk

    Same here. I've been playing this morning and the only way I can now get IPv6 working is to drop my modem back into router mode and double NAT IPv4 and NAT IPv6, which is far from ideal. Enabling IPv6 via the UTM just hangs my WAN connection and I get no link out to the internet across IPv4 or IPv6. That properly sucks given that it all used to work perfectly; I'm massively disappointed.

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