Skip to Content
The Book of PF
book

The Book of PF

by Peter N.M. Hansteen
December 2007
Intermediate to advanced
184 pages
4h 45m
English
No Starch Press
Content preview from The Book of PF

Debugging Your Rule Set

What happens when your configuration does not behave as you expected it to? It is possible there is an error in the rule set's logic, and if so you need to find the error and correct it. Tracking down logic errors in your rule set can be time consuming and could involve manually evaluating your rule set, both as it is stored in the pf.conf file and the loaded version after macro expansions and any optimizations.

Before diving into the rule set itself, you can easily determine whether the PF configuration is what is causing the problem. Disabling PF by running the command pfctl -d to see if the problem disappears is a valid test that can save you a lot of trouble.

On the mailing lists, news groups, and other forums, we frequently ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.

Read now

Unlock full access

More than 5,000 organizations count on O’Reilly

AirBnbBlueOriginElectronic ArtsHomeDepotNasdaqRakutenTata Consultancy Services

QuotationMarkO’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.
Julian F.
Head of Cybersecurity
QuotationMarkI wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.
Addison B.
Field Engineer
QuotationMarkI’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.
Amir M.
Data Platform Tech Lead
QuotationMarkI'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Mark W.
Embedded Software Engineer

You might also like

The Book of PF, 2nd Edition

The Book of PF, 2nd Edition

Peter N.M. Hansteen
What Successful Project Managers Do

What Successful Project Managers Do

W. Scott Cameron, Jeffrey S. Russell, Edward J. Hoffman, Alexander Laufer
Perfecting Your Thinking Skills

Perfecting Your Thinking Skills

MIT Sloan Management Review

Publisher Resources

ISBN: 9781593271657Errata