I'm investigating migrating Google-internal uses of qemu's slirp-based networking to passt.

One major gap I've discovered is the apparent lack of support in passt for something like the "guestfwd" flag the slirp network backend handles:

This allows us to open outbound connections from the VM to an external service listening on a known port.

As far as I can tell, passt's tcp-ports and udp-ports flags appear to map to slirp's hostfwd flags, only allowing traffic to flow into the VM.

Am I missing something? If this functionality indeed isn't supported, are there plans to add it?

Thanks,

Peter Foley