SFTP Connection fails with Alpine image on Linux Kernel 5.14.0-427.16.1.el9_4.x86_64

[GitGuruGangsta]

On connection container terminal shows: "Accepted password for from 10.0.10.150 port 42379 ssh2"

But there is no connection established. It seems that outbound connection is prevented.

This appears only on alpine images (for a year old image and also for the newest one) and only on a new Linux kernel version of the host we assume.

The debian images work fine, no matter which Linux kernel is installed on the container host.

The problem occured since we updated our kubernetes cluster from older CentOS nodes to Rocky Linux (5.14.0-427.16.1.el9_4.x86_64) using the alpine images.