Connecting a Hardware wallet to a full node
How to connect your hardware wallet to a full node depends heavily on what wallet software you're using. But assuming your software connects to a full node via the bitcoind RPC interface:
By default, the RPC listener only listens on localhost. If you want to connect to the RPC service from another computer, you'll have to allow other connections by including these lines in your bitcoin.conf (replace:
server=1
rpcallowip=&lt;add the IP you are connecting from here, or rpcallowip=* to allow all IPs&gt;
rpcport=8332

If you want to simply test whether your bitcoind RPC is accessible, you can simply make an HTTP request to the RPC host at port 8332 from the computer you're trying to connect from.