TY  - BOOK
AU  - National Institute of Information Technology
TI  - Basics of network security, firewalls, and VPNs
SN  - 81-203-2410-2
U1  - 001.5436 N.I.I.T. 
PY  - 2003///
CY  - Prentice-Hall Of India Private Limited, New Delhi
ER  -