Open port check from Logic Machine

[admin]

Use this to check if LM can connect to a certain TCP port or not.

Code:

function checktcp(ip, port)
  local sock = require('socket').tcp()
  sock:settimeout(1)
  local res, err = sock:connect(ip, port)
  sock:close()
  return res, err
end

-- change IP/PORT as needed
res, err = checktcp('192.168.1.1', 80)
if res then
  log('connect OK')
else
  log('connect ERROR', err)
end