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The Book Of Pf, 3rd Edition by Peter N.M. Hansteen (Paperback, 2014)

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OpenBSD s stateful packet filter, PF, is the heart of the OpenBSD firewall. With more and more services placing high demands on bandwidth and an increasingly hostile Internet environment, no sysadmin can afford to be without PF expertise. The third edition of The Book of PF covers the most up-to-date developments in PF, including new content on IPv6, dual stack configurations, the 'queues and priorities' traffic-shaping system, NAT and redirection, wireless networking, spam fighting, failover provision ing, logging, and more. You ll also learn how to: Create rule sets for all kinds of network traffic, whether crossing a simple LAN, hiding behind NAT, traversing DMZs, or spanning bridges or wider networks Set up wireless networks with access points, and lock them down using authpf and special access restrictions Maximize flexibility and service availability via CARP, relayd, and redirection Build adaptive firewalls to proactively defend against attackers and spammers Harness OpenB