I "think" we figured out the problem. A bunch of us on the podman team started hacking on it (thanks to Matt, Nalin, Matt, Brent, etc). I think we have a work around for now. We're still determining the longer term solution. I commented in the Stackoverflow, but copying here for ease:

I just tried this on RHEL 8 and I was able to reproduce this issue. We also figured out the issue (I think). Try the following:

sudo sysctl -w net.ipv4.ping_group_range="0 2147483647"

You might be being limited by the group range and /etc/subuid /etc/subgid:

I'm not sure what the long term solution is yet, but if this works, you can likely fix it with sysctl for now.


Best Regards
Scott M

On Wed, Oct 20, 2021 at 2:12 PM Gerben Venekamp <> wrote:
I am trying to setup networking in rootless containers. What I would like to have is both internal, i.e. container to container, and external, e.g. ping, inside a single container. I get internal working as well as external, however never both at the same time within a single container. I have raised this question on stackoverflow as well. The question on stackoverflow can be found at:

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