Inside network perimeter security  the definitive guide to firewalls, VPNs, rooters and intrusion detection systems 
Stephan Northcutt . [et al]. 
 - Delhi  Pearson Education  2003 
 - xxvii, 678p.: ill; 26cm. 
<br/><br/><label>ISBN: </label>8178087618 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks-Security measures.
<br/><br/><label>Dewey Class. No.: </label>005.8  / I5I