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Host cannot access a macvlan docker container via IPv6

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Hi guys,

My server runs 6.10.2 and host access to custom network settings are enabled. Unfortunately it seems to work only via ipv4. If I remember correctly It used to work with both ipv4 and ipv6 on 6.10 RC.

 

I have checked IPv6 routing table and there is nothing related to shim-br0 interface (see the ss).

 

Any ideas?

Snímek obrazovky 2022-06-04 v 12.01.23.png

  • Author

Anyone?

Host access works for ipv4 only, the ipv6 part was removed because it caused interference with other ipv6 related activities, which could break the communication.

 

 

  • 3 weeks later...
  • Author

can it be solved?

  • 6 months later...

Would be interesting to know whether there is a solution to have access to ipv6 containers / addresses from host.

  • 4 months later...

I'm also looking for a fix for this issue. Spent hours debugging my own code until I figured out the UnRAID host (6.11.5) is not reachable over IPv6 from within a container ...

 

Any way to change this stupid behaviour? I tried manually setting routes but they seem to be ignored ...

 

EDIT: Solved the issue by throwing a second NIC into the system. 1st NIC is for UnRAID and for all VMs, 2nd NIC is just for Docker containers. That way traffic is forced to go out NIC2, through the switch and into NIC1 which makes that work. 

Still hoping there can be a proper solution in the future - kind of a waste of a NIC (and power)...

Edited by Leseratte10

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