net::ssh remote port to local socket

forward.rb

# on remote machine
# nc -l -p 1212

# on local machine
ssh = Net::SSH.start(remote.ip, "centos", keys_only: true, key_data: [remote.ssh_key])

tempfile = Tempfile.new("net_ssh_forward_test")
path = tempfile.path
tempfile.delete

us = UNIXServer.open(path)
ssh.forward.local(us, 'localhost', 1212)

client = UNIXSocket.new(us.path)
client.puts "hello world"

ssh.loop