[SOLVED] SSH is inaccessible over IPv6 on thunderbolt interfaces?

[scyto]

I setup a promox v8 cluster.

I have 3 nodes where NIC 1 is connected to a LAN - this is purely using IPv4.
NIC2 (thunderbolt direct connection) on each node are purely using IPv6

• I can ping -6 node 3 from node 1.
• I can curl the 8006 port on node 3 from node 1 over IPv6 ok
• I can't access SSH port 22 on node 3 from node 1

I checked:

1. that sshd is listening on both 0.0.0.0 and ::
2. that the firewall is off at the cluster level and that there are no IPTables whatsoever

At this point i am stumped (but i am new to proxmox...)

 

[scyto]

This is also affecting ceph on port 3300 - i can see it is listening on <ipv6add>:3300 and a bunch of other ports, but when i setup node two of ceph i get "Could not connect to ceph cluster despite configured monitors" and i get no connection if i try and curl the ports.

I am stumped.

 

[scyto]

This seems to be caused by a bug when only using thunderbolt interfaces.

Marking as solved as I now know the cause.