Some container are using ipv6 I did not set

Hello,

I have a problem with some of my containers and ipv6

Let's talk about Jackett for example (and I tried the different releases available on the App Store and I hv the same problem).

I've configured the container with Network Type: custom br0 and I have set a ipv4 and ipv6 (10.0.1.39, 2a01:my:pre:fix:10:0:1:39). 

But Jackett couldn't reach some websites so I've investigated and found out in the log of my firewall (pfsense appliance) that it is using another ipv6 ! (which is not allowed in the firewall of course, if I do, Jackett works perfectly)

Logs:

[2a01:my:pre:fix::42:aff:fe00:127]:42308[ipv6destination]:443

1) I don't know why it is using this host ID 42:aff:fe00:127

2) I cannot find this ipv6 on my unraid server

docker inspect --format {{.NetworkSettings.Networks.br0.GlobalIPv6Address}} $(docker ps -q) | grep :127
docker inspect --format {{.NetworkSettings.Networks.br0.IPAMConfig.IPv6Address}} $(docker ps -q) | grep :127
==> nothing

(But maybe I'm not using the best commands to investigate.)

Can someone help me ?

Rmq: ipv6 is working as expected with most of my containers only 2-3 have this problem.

Rmq: "IPv6 privacy extensions" is disabled in the network settings.

Rmq: I've replaced a part of my network id with "my:pre:fix" for privacy purpose, but of course it is configured with the correct one.

KR,

P'Bear

Edited January 12, 20224 yr by pee_bear