Building Firewalls with OpenBSD and PF
Written by Jacek Artymiak, a frequent contributor to ONLamp.com, Building Firewalls with OpenBSD and PF is the first and only print publication devoted solely to the subject of the pf packet filter used in OpenBSD, FreeBSD, and NetBSD operating systems. Topics covered include: firewall design, ruleset syntax, packet normalization (scrubbing), packet redirection (masquerading), packet filtering, bandwidth management (ALTQ), load balancing, and more. The author maintains a web site and a mailing list for the readers of his book.
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address assigned ALTQ anchor antispoof authpf bandwidth Bandwidth Shaping bastion host boot bridge cbq(red Chapter child queues Configuring OpenBSD default disk Enter/Return key etc/pf.conf Ethernet ext if proto ext_if inet proto external hosts external interface firewall firewall host firewall's external FreeBSD hardware HFSC hit the Enter/Return ICMP ifconfig inbound inet proto tcp install OpenBSD Internet IPv4 IPv6 linkshare load balancing MAC address machine macro nat on ext_if NAT rules nat_proto NetBSD Network Address Translation network segment operating system options outbound packet filter packet redirection packets sent parent queue partition pass out quick pf.conf pfctl F pfctl(8 port 22 SSH port 80 port number priority PRIQ private hosts protocols prv_ad prv_if prv_if:network prvnet public IP addresses queue QUEUE DEFINITIONS quick on ext quick on ext_if ruleset running screened LAN spamd synproxy tcpdump timeout traffic users