In host mode it is passed. But host mode is only available on Linux.

A special situation is when the docker host is ipv4 and ipv6 (which is quite normal today) and the containers are ipv4 only.
Then clients connecting per ipv4 are connecting the host per ipv4 (host mode/Linux only) and the correct client source address is seen in the container.
But if the client connects with ipv6 it is routed through the docker_gwbridge per ipv4 and the container can only see the IP address of the bridge. MS would say this is a feature 😄
So would be nice we could enable ipv6 in the swarm containers and support in compose >= 3.

It seems to come something ipv6 libnetwork related in the next release v20.10...
But yes there should be some information for the many open ipv6/source ip related and duplicate-closed issues with hacks and special case workarounds on moby/moby. Could fill a book. At least a more complete documentation at https://docs.docker.com/config/daemon/ipv6/

Original ip is not passed to containers ... #157

Description

Activity

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions