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I'm creating a layer 3 SSH tunnel with this command:

ssh  -w any:any root@xx.xx.xx.xx

I want to know the name of the interfaces that it creates. Typically it's tun0, but it varies.

I could force use a specific name, but that could cause a conflict with an existing name. There should be a way to retrieve that name.

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Try adding -v to your ssh invocation, then capturing the output and grepping for the tunnel device name. Unfortunately I'm not able to say any more than that, since I can't get that feature to work at all on my server.

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