Port Alert will monitor and alert you via text or email when a TCP port(s) timeout for a continuous period of time.It supports both local and remote systems as well as WWW, FTP, SSH, SMTP, DNS, POP3, IMAP, Oracle SQL and MYSQL ports. You are enabled to select common ports such as port 21 or 80 directly from the drop-down menu. If the port you would like to target is not listed you are permitted to easily add it to the monitoring list.Port Alert works by sending queries every 10 seconds (default) to the URLs that you have added and then within your established parameters it will then notify you of any performance timeouts.