require "net/ssh"

hostname= "sftp-dev.gethightower.com"
username= "ftp-client-test"
password= "<fill in>"

failures = 0
1000.times do
  begin
    Net::SSH.start(hostname, username, password: password, non_interactive: true)
  rescue => ex
    puts ex.message
    failures += 1
  end
end
puts failures