I have a Linux box that runs both LXC and VirtualBox side by side. All the containers and VMs are set to bridge mode. Unfortunately for some reason, the VirtualBox VMs can’t talk to LXC containers. Pinging yields a response, but any TCP connection fails. Both LXC and VBox can talk to the host fine. This is how you can resolve the issue.
Bridging VirtualBox and LXC
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