Portmon -
Block websites, games and applications to boost your productivity and reclaim your free time.
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Other website blockers are easy to cheat. Cold Turkey Blocker makes it almost impossible to stop the block once you lock it.
The different locking options available can be found on the features page.
Block anything from specific websites and applications to the entire internet with a few exceptions. Want to schedule breaks from your computer? You can do that too.
See an overview of all other features.
All of your settings and statistics are stored locally on your computer and everything you block is kept private. If you share your computer, an application password can be set for extra privacy.
Feel free to read our privacy statement.
Subscriptions kinda suck. Our products are a one time purchase so that you can stay productive in the long term. Only one product key is needed for all computers you personally use and you also get free lifetime updates.
Our pricing page speaks for itself.
Based on the name , this typically refers to the classic Windows utility Portmon for Windows by Sysinternals (now part of Microsoft). However, in modern contexts, it can also refer to lightweight monitoring agents used in DevOps.
: While historically significant for reverse engineering and hardware troubleshooting, Portmon was designed for older versions of Windows (up to Windows XP/Server 2003). It often requires "Administrative mode" to run and is frequently incompatible with modern 64-bit Windows operating systems. 2. Portmon: Sports Science & Muscle Oxygenation
In modern environments, administrators and developers often use alternative tools for hardware debugging: portmon
: Can monitor port activity on a remote computer across a network.
Portmon does not natively support 64-bit versions of Windows 7 and above. You may need to use a virtual machine running a 32-bit OS or look for modern alternatives. Based on the name , this typically refers
: Researchers use Portmon to assess muscular fatigue and recovery times during high-intensity training, such as plyometric exercises.
The true genius of Portmon lay in its usability. It offered powerful filtering—allowing users to watch only traffic from specific processes or only outgoing commands—and it could decode common control codes. But perhaps its most impactful feature was its ability to log directly to a file for post-mortem analysis. When an industrial automation system crashed sporadically every Tuesday at 3:00 PM, a technician could leave Portmon running all day, return to a massive log, and search for the anomalous NACK (negative acknowledgment) character that preceded the crash. This turned reactive troubleshooting into a precise, forensic science. It often requires "Administrative mode" to run and
The classic Sysinternals Portmon has not been updated in many years. Because it relies on a legacy kernel driver, it frequently encounters "Access Denied" or "Unable to start driver" errors on modern operating systems like Windows 10 or Windows 11. These OS versions have stricter security policies regarding kernel-mode driver signing, often preventing unsigned or legacy drivers like Portmon's from loading.
