infomaniak IPv6 issues

[scooke]

OK, i'm gonna say it: It's something to do with infomaniak, and it's time to move to a different VPS provider.

[Gengar]

@scooke 🥲 I really like Infomaniak especially their commitment to ecology https://www.infomaniak.com/en/ecology ... If I have no other choices maybe I will switch to another hosting provider... We will see...

[BrutalBirdie]

@Gengar
Just read the Hetzner page: https://www.hetzner.com/unternehmen/nachhaltigkeit/
If you are looking for an eco-friendly provider, Hetzner is pretty good.

[Gengar]

@BrutalBirdie Oh thanks for the link ! I will read what they do

[jdaviescoates]

@Gengar I have a spreadsheet with a bunch of Eco VPS providers here:

https://ud.coop/ecovps

I should add Informaniak!

But yeah Hetzner is probably the best option overall imho, great value and great UX. I tried Netcup because they are even cheaper, but 1) you have to pay 6 months in advance (whereas with Hetzner you can just pay for an hour if you cancel), 2) their default Ubuntu is stripped down and so installing Cloudron doesn't work until you mess around installing full Ubuntu first 3) their UI/ UX is just no way near as good as Hetzner's, etc.

[Gengar]

@jdaviescoates If it works with Infomaniak, it would be another cheap VPS and ecofriendly one yeah. They have their "VPS Light" that is cheap and atm, except the ptr6 value that switches to null after updates, that seems solid.

With hetzner , can you setup yourself your PTR ? For Infomaniak we need to open a ticket to their support.

[avatar1024]

@jdaviescoates said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

but 1) you have to pay 6 months in advance (whereas with Hetzner you can just pay for an hour if you cancel), 2) their default Ubuntu is stripped down and so installing Cloudron doesn't work until you mess around installing full Ubuntu first 3) their UI/ UX is just no way near as good as Hetzner's, etc.

Just to say, I used to be with Hetzner and I am now with Netcup and regarding: 1) you do NOT have to pay 6 months in advance (it's just cheaper if you do); 2) I had no such issue with their ubuntu version. I've installed Cloudron from blank ubuntu from Netcup and I've been running several Cloudron instances with no problems. Totally agree with 3), Hetzner UI is SO much better...but then their prices are also significantly higher so I'd rather get better hardware and a lesser friendly UI.

However on my servers, and despite following all the right steps, I kept having issue with IPv6. PTR records and DNS all check OK on Cloudron, MX checks etc, but I keep getting random email bounce from Gmail. The only final solution was to disable IPv6 completely. Perhaps Hetzner is better in that respect.

[jdaviescoates]

@Gengar said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

With hetzner , can you setup yourself your PTR

Yes, you can.

[jdaviescoates]

@avatar1024 said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

1. you do NOT have to pay 6 months in advance (it's just cheaper if you do)

I'm pretty sure I had to at the time, but perhaps it's just the default and I just missed something during the sign-up process. Or perhaps it was because I was a new customer (I note that Hetzner makes new customers pre-pay €20 these days too)

They refund you if you cancel before 6 months, but I still found it a bit annoying.

@avatar1024 said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

2. I had no such issue with their ubuntu version. I've installed Cloudron from blank ubuntu from Netcup and I've been running several Cloudron instances with no problems.

I originally had no problem either. But then something changed and I did. But perhaps enough people complained and they changed it back again? Or perhaps you installed your before the change?

I've so far not experienced any IPv6 weirdness nor email issues since I enabled the PTR6 on Hetzner.

[girish]

@Gengar infomaniak set it up today .

My firewall is more permissive than yours. Note that ICMPv6 is probably not included in your firewall. I cannot completely understand infomaniak settings to suggest one way or another. Unlike IPv4, IPv6 requires ICMPv6 and won't work without it.

[girish]

@Gengar ha, I caught it red handed!

ubuntu@ov-9503b4:~$ curl -6 https://ipv6.api.cloudron.io/api/v1/helper/public_ip
curl: (28) Failed to connect to ipv6.api.cloudron.io port 443 after 135991 ms: Couldn't connect to server

In fact, IPv6 just stopped working overnight just like that.

[Gengar]

@girish Ah ! Does it mean the issue is coming from Infomaniak , like from their internal network config ? Or could it be linked to something in Ubuntu that is installed by Infomaniak when we choose Ubuntu 24.04 (like if their ubuntu wasn’t 100% stock image but a bit edited) .

[scooke]

@Gengar Yes.

[girish]

@Gengar yeah, I think so. A reboot fixed the routing .

[Gengar]

@girish yeah for me too, either a reboot or :

sudo ip -6 neigh flush all
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sleep 2
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=0
sleep 2
sudo netplan apply
sudo systemctl restart docker

it works too, but it's just a workaround.

[girish]

@Gengar haven't checked but setting dhcp6 to false in /etc/netplan/ could help not getting an ipv6 altogether.

[girish]

@Gengar Well. Unfortunately, for me , the server goes unreachable periodically. As in IPv4. Do you hit the same? The whole thing is unstable connectivity wise.

[Gengar]

@girish Mhhh okay, no on my side ipv4 works fine, it's only the ipv6 part that is unstable with the reverse resolution (PTR6) .

[Gengar]

@girish & @joseph , I've reached out to Infomaniak on tuesday and they told me the following today :

Bonjour,
Après demande, nos experts Cloud sont au courant du problème rencontré. Pour le moment, nous n’avons pas encore de solution définitive.
En attendant, une solution temporaire serait de configurer un renouvellement du DHCPv6 via un cron toutes les 12 heures. Cela devrait permettre d’éviter ce type de désagrément jusqu’à ce qu’une correction soit mise en place.
Soyez assuré que ce point est bien pris en compte dans notre liste des tâches à traiter. Il sera priorisé dès que possible.
Merci pour votre patience et votre compréhension.
Merci pour votre confiance. Nous restons à votre disposition.

I will try to do what they suggest and we will see if it's a working workaround or not...

[BrutalBirdie]

@Gengar said in infomaniak IPv6 issues:

Bonjour,
Après demande, nos experts Cloud sont au courant du problème rencontré. Pour le moment, nous n’avons pas encore de solution définitive.
En attendant, une solution temporaire serait de configurer un renouvellement du DHCPv6 via un cron toutes les 12 heures. Cela devrait permettre d’éviter ce type de désagrément jusqu’à ce qu’une correction soit mise en place.
Soyez assuré que ce point est bien pris en compte dans notre liste des tâches à traiter. Il sera priorisé dès que possible.
Merci pour votre patience et votre compréhension.
Merci pour votre confiance. Nous restons à votre disposition.

Translation:

Hello,
Our Cloud experts are aware of the problem you are experiencing. For the moment, we don't have a definitive solution yet.
In the meantime, a temporary solution would be to configure a DHCPv6 renewal via a cron every 12 hours. This should avoid this type of inconvenience until a fix is in place.
Rest assured that this point is well taken into account in our to-do list. It will be prioritized as soon as possible.
Thank you for your patience and understanding.
We are grateful for your confidence. We look forward to hearing from you.