nettest 1.1 – Nettest is a program which monitors a network connection, and takes some action (either email, audible notification, syslog entries, or all of the above) if/when the connection goes down. It’s great for xDSL/Cable/Mission Critical Network Connections.
You can download it from the following link: https://packetstormsecurity.com/files/download/12782/nettest-1.1.tar.gz
Source: https://packetstormsecurity.com/files/12782/nettest-1.1.tar.gz.html