this post was submitted on 16 Jul 2023
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Proxmox

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Proxmox VE is a complete, open-source server management platform for enterprise virtualization. It tightly integrates the KVM hypervisor and Linux Containers (LXC), software-defined storage and networking functionality, on a single platform. With the integrated web-based user interface you can manage VMs and containers, high availability for clusters, or the integrated disaster recovery tools with ease.

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Has anyone got IPv6 working in Debian LXCs? (lemmy.world)
submitted 1 year ago by LanguageDensity@lemmy.world to c/proxmox@lemmy.world
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cross-posted from: https://lemmy.world/post/1520963

I have tried using the debian 10/11/12 LXC templates on Proxmox, but I can't get IPv6 to work as expected. Which is weird, since just setting IPv6 to SLAAC/auto works as expected for ubuntu 20.04 containers with no additional configuration in the container itself.

What I encountered:

  1. Debian overrides the DNS settings set in proxmox with values from DHCP
  2. DHCPv6 DNS updates required manually setting send fqdn.fqdn "..."; in dhclient.conf
  3. DHCPv6 DNS updates only work when manually calling dhclient -6

Those all can be fixed, but are bit of a pain, since I have to manually update configuration files in the container itself. I also have to duplicate the configuration, for example the hostname/domain name in the configuration.

Has anyone got IPv6 working on debian LXCs without any additional config in each container? Or any ideas what's different between the debian and ubuntu LXCs?

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