Inside network perimeter security :  the definitive guide to firewalls, VPNs, routers and intrusion detection systems / 
Stephen Northcutt ... [and others]. 
 - xxvii, 678 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>0735712328 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks --Security measures.
<br/><br/><label>LC Class. No.: </label>TK5105.59   / .I67 2003