TY  - BOOK
AU  - Holden,Greg
TI  - Guide to firewalls and network security: with intrusion detection and VPNs 
SN  - 0619130393
PY  - 2004///
CY  - Boston
PB  - Course Technology
KW  - Firewalls (Computer security)
KW  - Problems, exercises, etc
KW  - Computer networks
KW  - Security measures
KW  - Extranets (Computer networks)
ER  -