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The Book of PF, 2nd Edition by Peter N.M. Hansteen

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Chapter 8. Logging, Monitoring, and Statistics

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Exercising control over a network—whether for your home networking needs or in a professional context—is likely to be a main objective for anyone who reads this book. One necessary element of keeping control is having access to all relevant information about what happens in your network. Fortunately for us, PF (like most components of Unix-like systems) is able to generate log data for network activity.

PF offers a wealth of options for setting the logging detail level, processing log files, and extracting specific kinds of data. You can already do a lot with the tools that are in your base system, and ...

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