iftop - iftop does for network usage what top(1) does for CPU usage.
WebTitan - WebTitan is an advanced DNS based web content filter and web security layer that blocks malware, ransomware and phishing attempts as well as providing web content control. Cloud and gateway versions available.
vnStat - vnStat is a console-based network traffic monitor for Linux and BSD that keeps a log of network...
AuthAnvil - AuthAnvil software is an integrated identity and access management tool designed to help IT managers service their networks, infrastructure network, and ensure that devices are safe and secure at all times. Read more about AuthAnvil.
nload - Monitor network traffic and bandwidth usage in real time
OneLogin - On-demand SSO, directory integration, user provisioning and more