HOWTO: Transparent Packet Filtering with OpenBSD
by Nate Underwood

Many of us would like a robust firewall to protect our network, but would rather not waste precious IP addresses. In this article we are going to build a robust, stateful packet filter that uses no IP addresses. Thankfully, OpenBSD provides built-in support for this "invisible firewall" via the bridge interface and the new packet filter, pf. Read More

Setting Up ISC-DHCP 3.x Under FreeBSD
by Linh Pham

DHCP is one of the most common network services found in corporations, home networks, and Internet service providers which dynamically assign IP addresses from a specific pool to a device for a particular length of time to help use allocated IP addresses more efficiently. In this article, I will provide the basic steps on setting up a DHCP server on a FreeBSD machine using the Internet Software Consortium's DHCP software. Read More

Thank You For Your Support
by Randy Karl

Recently we sent some DN magazines to a group in response to such a request. Their proposal was good, but their follow through was excellent. I liked it so much I am including the entire letter they sent us. (Transcribed from a typed letter we received in the mail, with photos included.) Read More

Trawling the Ports Collection
by Greg Lehey

Manipulating graphical images is an important part of using a desktop computer nowadays. Graphics-capable web browsers have been around for ten years, and in an earlier issue of this column we looked at graphics displays for documents. This month we'll look at using xv, one of the old graphics diehards, for processing images from digital cameras. Read More

Book Review: Programming PHP
by Linh Pham

In this book review, I will be giving a detailed overview of "Programming PHP" and will provide any critiques and additional comments that you can take into consideration when deciding to purchase the book. Read More

Answerman
by Todd Whitesel

Hey! Mister Answerman is on vacation this month, running the Registration counter at Anime Expo (http://www.anime-expo.org). Come on by and see all the BSD machines in action! Read More

Daemon's Advocate
by Wes Peters

Wes is on vacation as well, spending the (U.S.) Independence Day with his family. Read More