"Although many books discuss TCP/IP and internetworking, it is rare to find one that specifically discusses firewalls. The most poular text on the subject is Firewalls and Internet Security: Repelling the Wily Hacker by William R. Cheswick and Steven M. Bellovin."

"Run, don't walk to your nearest technical book shop and buy this book (Firewalls and Internet Security) by William R. Cheswick and Steven M. Bellovin, both security experts who work at AT&T Bell Labs. If you run an MIS organization, make this book required reading for anybody responsible for your LANs and internetworks."

"There are three basic types of firewalls: packet filtering, circuit gateways, and application gateways. (For good definitions, check out Firewalls and Internet Security by Cheswick and Bellovin.)"

"Considered by many the definitive book on Internet security, this book (Firewalls and Internet Security) has become a best-seller by offering useful advice from veteran security people. The book is really for the larger system administrator, offering a lot of advice on gateway protection that may be beyond most SCO users. Even so, the book offers insights into many methods that can be readily used by the SCO administrator."

"Firewalls and Internet Security has no rival; while much of the information it provides is available elsewhere, no comparable summary exists. Anyone in charge of installing or administering an Internet firewall would be insane not to get a copy."

"Anyone who has to administer a network of computers or is thinking of connecting to the Internet ought to read this book (Firewalls and Internet Security) first. It is obvious that the authors have experienced and solved more security problems than most systems administrators would want to see in a lifetime. To miss the opportunity to benefit from their advice and experience borders on the foolhardy."