TY  - BOOK
AU  - Notrhcutt, Stephen
TI  - Inside network perimeter security: the definitive guide to firewalls, VPNs, rooters and intrusion detection systems
SN  - 8178087618
U1  - 005.8 
PY  - 2003///
CY  - Delhi
PB  - Pearson Education
KW  - Computer networks-Security measures
ER  -