Port forwarding (through bastion to AWS instances) in Ruby

gistfile1.rb

require 'net/ssh'

begin
  puts "Beginning"
  Net::SSH.start('bastion_server_address', 'your_username', :password => 'your_password_here') do |ssh|
    puts "Connected to bastion"
    ssh.forward.local('localhost', 5432, 'host_address', 5432)
    ssh.loop { true }
  end
end