portop docs

Traffic

Established TCP connections show how many bytes they sent and received, and the rate between two refreshes.

Sources

SystemRead from
LinuxThe kernel's socket diagnostics over netlink, as ss -ti shows them; no root and no eBPF
macOSA nettop snapshot; other users' connections need sudo
WindowsNot available: Windows keeps these counters only for connections an administrator enabled statistics on, and portop does not change system settings

Where it appears

The TRAFFIC column in the established view (sortable, busiest first), the remote cell of the web dashboard and Cockpit, and rx_bytes/tx_bytes in JSON. Turn it off with --no-traffic or resolve_traffic: false.