Accessing nmcli on HA Yellow

Configuration
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I currently use Home Assistant Yellow in a network with multiple VLANs and use a flurry of allow/deny rules to manage connections between the VLANs. I thought it might be neater to enable HA to connect to these VLANs directly by having multiple network interfaces tagged for these VLANs. This should theoretically be easy using nmcli command, but for the love of everything holy, I can’t get to actually configure this.
I can SSH into home assistant, but nmcli cannot be used from the console and using login seems useless as it asks for login and password and no combination of any credentials I can possibly think of works.

Is there any way I can run the nmcli command on HA Yellow?

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You could also disable “protection mode” on the SSH addon. That will give you full control as well (including all docker commands to take control or start a shell in the running containers)

As soon as you create the interface with nmcli, you can manage it from the HA gui.