Strassberg, Keith. <br/><br/>
Firewalls : The Complete Reference 
Keith, Strassberg, Richard, Gondek & Gary, Rollie. 
 - New Delhi :  Tata McGraw-Hill Publishing Company Limited,  c2002. 
 - xxvi, 944 p.:  [69] 
<br/><br/><label>ISBN: </label>0070583110 
<br/><br/><label>Dewey Class. No.: </label>005.133C  / STR/FIR