Whitman, M.E / Mattord, H.J  (etal) <br/><br/>
Guide to firewalls and network security:  intrusion detection and VPNS 
Micheal E. Whitman/ Herbert J. Mattord (etal) 
 - 2nd 
 - Boston  Course technology  2009 
 - xxiv,496p;ill.  pbk 
<br/><br/><label>ISBN: </label>1435420160