OpenPorts is a simple script which can be run as a cron job every 5 minutes, checking the open and listening ports on the local system with netstat. If there is a difference since the last time it was run, an e-mail is sent to the system administrator containing the list of new open ports.
You can download it from the following link: https://packetstormsecurity.com/files/download/23338/openports-0.2.tar.gz
Source: https://packetstormsecurity.com/files/23338/openports-0.2.tar.gz.html

