How to have Chef use a different ip

Try "yourusername@gateway.node", it will prompt for the password

Looking very briefly at the code in chef I did not see a way to pass in gateway password info. I would set up key-based access between your host and the gateway, anyway, only takes a minute and saves typing.

Recreating the node (and client) with the new name is one option, but you can preserve the ones you already have. This requires client configuration - by the time the node retrieves attributes from the Chef server, it's already decided what its name is.

By default, chef-client will set the node name to the fully-qualified domain name of the host, as returned by ohai. You can check what name will be used by invoking ohai directly:

zts@chef ~ % ohai fqdn
[
  "chef.nat0.cryptocracy.com"
]

If that changes when you move the host, you'll need to edit /etc/chef/client.rb to set the desired nodename:

node_name "mynode.example.com"

Take a look at Chef Docs - client.rb for more about this configuration file.