Socket Sentry is a KDE Plasma widget that displays real-time network
traffic on your Linux computer. It shows you which processes are
communicating with which hosts, current data transfer rates, protocols,
and more. Socket Sentry combines the best parts of tools like iftop and
netstat in a modern desktop interface that's approachable and
easy-to-use.

Features:

* Monitor one or all network devices in each widget
* See over 10 different stats and other characteristics of each
connection
* View all connections individually or group by host and process/program
* Sort by any column with secondary sorting by transfer rate
* Quick search box helps you find specific connections
* Optional hostname lookup with configurable subdomain depth
* Customizable filter rules using the pcap expression language
* IPv6 support
* Efficient data sharing across widgets to minimize resource use
* Configurable security for multiuser PCs

Please note that after installing or upgrading the applet you need to
restart you Plasma Desktop session.