The question How to connect Mist to a remote private network? was marked as a duplicate of Can Mist be attached to a Geth node on a different computer over HTTP RPC? .
The (1) first [duplicate] question is asking about how to connect Mist to a remote private network.
The (2) second question is asking whether it is possible to connect Mist to a remote geth
node using HTTP RPC.
The answer to the (1) first question is that to connect Mist to a remote private network, spin up an instance of geth
on your local computer and connect this geth
instance to the remote network. Mist can then communicate with the local geth
instance that will have the connection to the remote network. This is a workaround and not a direct connection from Mist to the remote private network, but it should work.
The answer to the (2) second question is No. It is not possible to connect Mist to a remote geth
node using HTTP RPC.
I'm not fussed whether the first question is marked as a duplicate or not, but just would like to bring it to your attention that the questions and answers are slightly different.