الفهرس 
Chapter 1: INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 89 |  |  |
| | | from | 89 | | |
Abstract
an intrusion detection system (ids)is becoming an important step for many organization security after the spread for firewall technology at the network. firewall is considered as an external defense and not clever way to provide wily way of telling whether that traffic is normal or up normal ids is considered as an internal defense that can offer protection from external and internal attackers by analyzing network traffic a in internal room, its aclever way of telling whether that traffic is normal or up normal.