1 / 13

Research of the IP-Telephony for the Czech Armed Forces Lt . Bc . Zburníková Lucie

Research of the IP-Telephony for the Czech Armed Forces Lt . Bc . Zburníková Lucie. Main points of presentation. characteristic of IP-telephony aims of the scientific work DoS attacks prevention and response overall summary. Aims of the scientific work.

flint
Download Presentation

Research of the IP-Telephony for the Czech Armed Forces Lt . Bc . Zburníková Lucie

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Research of the IP-Telephony for the Czech Armed Forces Lt. Bc. Zburníková Lucie

  2. Main points of presentation • characteristic of IP-telephony • aims of the scientific work • DoS attacks • prevention and response • overall summary

  3. Aims of the scientific work • to create a possible network diagram • to categorize the DoS attacks • to make the total and actual list of them • to propose the form of detection and counteraction against them

  4. Network diagram

  5. Categories and types of Denial of Service attacks • Direct Denial of Service attacks: Single-tier attacks Dual-tier attacks Triple-tier ‘distributed’ attacks • Indirect Denial of Service attacks: The LoveBug virus Code Red and Nimda worms

  6. Direct Denial of Service attacks • Single-tier DoS Attacks (1990-1997) Examples: Ping of Death, SYN floods, other malformed packet attacks • Dual-tier DoS Attacks (late 1997)‏ Example: Smurf • Triple-tier DDoS Attacks (1998-2000)‏ Examples: TFN2K, Stacheldraht, Mstream

  7. Compare of the attacks • Older attacks are ineffective or of low danger. • The attempts that use new vulnerabilities of systems have low lifetime. • Flood attacks are simple, but dangerous. • DDoS flood attacks cause serious problems which can shift of any server. • Some new attempts can combine number of different simple attacks and can use DDos.

  8. Prevention and Response • Intrusion detection system (IDS) • network intrusion detection system • protocol-based intrusion detection system (Example: Snort)‏ • application protocol-based intrusion detection system • host-based intrusion detection system • hybrid intrusion detection system (Example: Prelude)‏ • Intrusion prevention system • (Self)defence against DoS attacks

  9. Network-based vs. host-based system + - • It's able to verify if attack was succesful or not. • The functionality isn't affected by transmission or using the encryption. • It's able to prevent the attack. • It uses server as a source. • The possibility of usage depends on OS. • The extensibility - requires installation of one agent / server. Host-Based • It protects all terminal station on the monitoring net. • It has no influence on function of the terminal stations / servers. • It's able to detect DoS attacks. • There are more difficult implement. in the environment of the switching LAN. • Monitoring above 1Gb/s is the problem for now. • Generally it can't for-actively stop the attack. Network-Based

  10. Solution Set Switch Sensor Catalyst 6500 IDS Module Router Sensor 3700 7xxx 1700 2600 3600 Firewall Sensor 501 506E 515E 525 535 Network Sensor 4210 4235 4250 Host Sensor Web Server Edition Standard Edition Web UI Embedded Mgr Secure Command Line CiscoWorks VMS Mgmt IDS on platforms of Cisco

  11. General defence • The systems for detection (and prevention) unauthorized intersection get past accessories for security nets by the firewalls. • We obtain high level of defence in the face of unauthorized activities by the combination of net IDS and IDS for servers. • The correct function of IDS has to be supported by regular plotting the adventitious information and upgrade of the system.

  12. Overall summary • VoIP telephony has a great potential to bring considerable advantages into telecommunications in comparison with standard technologies. • The main advantage is cost reduction especially in the case of long distance calls. • It offers quality phone services including secure voice and development prevention and response.

  13. Thank you for your attention

More Related