The eighth chapter of the book, The FreeBSD Corporate Networker's Guide is excerpted here with the permission of the publisher. No part of it may be further reproduced or distributed without the publisher's express written <Chanda.Leary-Coutu@awl.com>. The other chapters of the book covers topics such as system administration, fileserving, and e-mail delivery. More information about this book is available from the publisher, with whom you can also sign up to receive news of related titles. The author's web site for the book includes sample code, working examples, errata and a Q&A forum, and is available at http://www.freebsd-corp-net-guide.com/.