Ebook: The Book of PF: A No-Nonsense Guide to the OpenBSD Firewall

I like brevity so I am going to stick with it on my review. This book was easy to read and follow as the author progressed. Once or twice the author expected you to insert an external function to your rule set ([.]) without conjoining the location to the present example. However he did state that some functions were to be used as a base template which all I can think of was the *block all* rule...

Once I finished reading this book the only outstanding questions were learning the complete syntax definitions which can be found here:

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Thank you for providing us with such an informative and logical read.