TY  - BOOK
AU  - Vacca, John R.
AU  - Ellis, Scott R.
TI  - Firewalls jumpstart for network and systems administrators   
SN  - 1555582974
U1  - 005.8 
PY  - 2005///
CY  - Burlington 
PB  - Elsevier Digital Press 
KW  - Firewalls
KW  - Data security
ER  -