Script to Monitor Remote System -

[admin]

You can make multiple copies of this script as a resident script with sleep time set to 0. init script should not have any blocking or long-running parts.

Also non-blocking connect should be used and possible errors during receive should be checked:

Code:

if not sock then
  sock = require('socket').tcp()
  sock:settimeout(1)

  res, err = sock:connect('192.168.1.100', 2401)

  if not res then
    log('connect failed', err)

    sock:close()
    sock = nil
    os.sleep(1)
  end
end

if sock then    
  res, err = sock:receive('*l')

  if res then
    -- parse res
  elseif err == 'closed' then
    log('connection closed')

    sock:close()
    sock = nil
  end
end