TCP Monitor Plus is a free, lightweight, and highly popular TCP/IP network monitoring software designed for Windows. Originally launched in 2002 by OGA, it has remained a reliable, portable tool for users wanting a deeper look into their system’s network traffic beyond what native Windows tools offer. Key Features
The software is organized into 11 specialized tabs, covering a comprehensive mix of telemetry and standard network commands:
Traffic Monitor: Shows real-time incoming/outgoing transfer speeds, packet counts, and total data amounts layered with a dynamic visualization graph.
IP Monitor: Track specific data traveling through network adapters. With administrator privileges, it can monitor what protocols, remote hosts, and exact local application processes are generating traffic.
Session Monitor: Displays active communication sessions. Users can copy connection specs or force-terminate unauthorized sessions (requires admin rights).
Built-in Network Tools: Access graphical interfaces for classic command-line utilities including NETSTAT, NSLOOKUP, WHOIS, PING, and TRACERT.
Logging Capabilities: Generates permanent communication logs to track trends or audit security over extended periods. Interface & Usability
Portability: It does not require installation. You only need to unzip the file and run tcpmon.exe. It can run straight from a USB thumb drive.
Mini Monitor: If the primary dashboard is too intrusive, users can switch to a sleek, compact floating desk widget or lock it in the system tray.
Variant Version: A separate, streamlined build named TCP Monitor Plus (Type-S) isolates only the session monitor and auto-disconnect components for low-resource operations. Modern Updates
Following years of maintenance, the software received a major structural update—Version 3.00—bringing native IPv6 support to the Session Monitor, IP Monitor, NSLOOKUP, and NETSTAT tabs. Recent refinements from the developer, available directly on OGA’s Web Page, ensure smooth performance on modern systems up to Windows 11. If you would like to test this software, TCP Monitor Plus – 窓の杜
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