[Arrowmaster]

I had to look it up and I think it was a mix of user error and a bad container. At one point I had been trying to use the nicolaka/netshoot container as a sidecar to troubleshoot iptables on another container and it is/was(?) missing the iptables-legacy package and unable to interact with the first containers iptables.

As great as containerization is, having the right kernel modules available goes a long way and I probably wouldn't have run into trouble like that if the first container hadn't fallen back to iptables because nftables was unavailable.

All of these NAS OSs that include docker work great for the most popular containers, but once you get into the more complex ones strange quirks start poping up.