"lejeczek via Podman" <podman@lists.podman.io> writes:
You can see 'eth0@if5' came from cni network but what that 'tun0' is doing there? Every rootless container on my box gets it. many thanks, L.
I don't have a whole lot of [container] networking experience but this piqued my curiosity so I went digging. I run a couple rootless containers with no CNI networks and all of them also have this tap0 device set as the default route.
# ip route default via 10.0.2.2 dev tap0 10.0.2.0/24 dev tap0 scope link src 10.0.2.100
My guess is that this is the slirp-managed (in rootless) device that you can control with the "--network slirp4netns:..." flag in your podman run. The IP seems(?) to be the same in every rootless container I run: 10.0.2.100 I think CNI solely manages inter-container networking while slirp4netns handles everything else (outbound to LAN, internet, etc.). Lucas