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CurrPorts vs Netiquette: catalog facts
CurrPorts	Netiquette
Free Freeware from NirSoft; free to redistribute as long as nothing is charged.	Free Free download from Objective-See.
Windows	macOS, Command line
Shows the process, path and user behind every open port Can close TCP connections and kill the owning process	Connections grouped by the process that made them Shows ports, protocol, state and bytes transferred
Official requirements list Windows versions up to Windows 10 The 'Use DNS Cache For Host Names' option leaks memory during long auto-refresh sessions	macOS only, 10.15 or later Monitors connections but does not block them
Downloadable app	Downloadable app
Closed source	Closed source
License: Freeware	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.