Tài liệu Intrusion Detection and Prevention ppt

... Intrusion Detection and Prevention Because network traffic must cross the firewall to reach the end systems, ... appropriate. For many years, firewall vendors such as Cisco Systems, Inc. and Check Point have been including intrusion detection system (IDS) capabilities to their firewalls. These devices were ... through a port on a switch, and the interface that connects to...

Ngày tải lên: 26/01/2014, 04:20

... understanding: A large number of NT and Unix attacks involve going after the password file and then decrypting it off line. One of the bread and butter techniques of an attacker is to acquire and ... three commands: uname –a, id and w, which could reveal operating system information, user and group IDs, and other information. The hex dump in this slide shows the same three com...

Ngày tải lên: 24/01/2014, 10:20

... low and slow and covert channels. Covert channels involves hiding information in packet headers, or in what is called null padding, and can be a handy way to synchronize with Trojans. Low and ... debate the effectiveness of Jackal and the software that followed its lead, but from an intrusion detection point of view, the key point is that source port zero and SF set are a goo...

Ngày tải lên: 24/01/2014, 09:20

... more, and also consider the architecture for intrusion detection. 12 IDIC - SANS GIAC LevelTwo ©2000, 2001 12 Firewalls and Intrusion Detection • Firewalls perturb traffic – disrupt 3-way handshake • ... makes a wonderful policy for intrusion detection and security in general. An allow everything not specifically denied firewall policy makes site customized intrusion de...

Ngày tải lên: 24/01/2014, 10:20

... contain? A. Organization ID and WatchDogInterval. B. Organization ID and Organization name. C. Organization ID and TimeOutAlarmLevel. D. Organization name and WatchDogInterval. Answer: ... firewall to allow Telnet traffic from the sensors command and control interface to the router and UDP port 45000 traffic through the firewall and the routers to the director. Con...

Ngày tải lên: 10/12/2013, 17:15

... 192.168.1.1 and ( (tcp and ((tcp[13] & 2 != 0) and (tcp[13] & 0x10 = 0)) and (not dst port 80)) or (udp and not dst port 53 and not dst port 137) or (icmp and (icmp[0] != 8) and (icmp[0] != 0) and ... Intrusion Detection • Host-Based Intrusion Detection –Unix – Windows NT, 95, 98 • Network-Based Intrusion Detection –Shadow – ISS RealSecure –Cisco NetRange...

Ngày tải lên: 17/01/2014, 08:20

... system. 1 1 Intrusion Detection - The Big Picture – SANS GIAC ©2000, 2001 Intrusion Detection The Big Picture – Part VI Stephen Northcutt This page intentionally left blank. 20 Intrusion Detection ... for intrusion detection - revisited “How to use Risk Assessment tools!” This page intentionally left blank. 25 Intrusion Detection - The Big Picture – SANS GIAC ©2000, 200...

Ngày tải lên: 17/01/2014, 08:20

... 192.168.1.1 and ( (tcp and ((tcp[13] & 2 != 0) and (tcp[13] & 0x10 = 0)) and (not dst port 80)) or (udp and not dst port 53 and not dst port 137) or (icmp and (icmp[0] != 8) and (icmp[0] != 0) and ... pool. 2 Intrusion Detection - The Big Picture - SANS GIAC © 2000 2 Network-Based Intrusion Detection • Host Based Intrusion Detection –Unix – Windows NT, 9...

Ngày tải lên: 09/12/2013, 17:15

... dash. emphasis, brevity and, 33 colon and, 43, 46, 47 comma and, 43, 51 dash and, 43, 57, 58 dash vs. semicolon, 58 italics for, 41, 63 lists, 42 on action, 28, 30 parallelism and, 41 parentheses and, 57 positions ... examples are highly technical and therefore harder to understand, but technical editors and other technical publishing professionals must understand grammar, punctuat...

Ngày tải lên: 10/12/2013, 12:15

... the most important intrusion detection sensors on the Internet. 17 Intrusion Detection - The Big Picture – SANS GIAC ©2000 17 Intrusion Detection Roadmap What are the pieces and how they play ... ©2000 18 P Indications and Warning P Early Detection P Detection P Late Detection P Negation P Early Negation P Late Negation P Host Negation P Host Detection P Host...

Ngày tải lên: 10/12/2013, 14:16