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DoS/DDoS Issues Defense Functions The DoS/DDoS defense function can detect and protect the following attacks: 1. SYN flood attack 2. UDP flood attack 3. ICMP flood attack 4. TCP Flag scan 5. Trace route 6. IP options 7. Unknown protocol 8. Land attack 9. Smurf attack 10. SYN fragment 11. ICMP fragment 12. Tear drop attack 13. Fraggle attack 14. Ping of Death attack 15. TCP/UDP port scan Cooperate with the IPFilter/Firewall The DoS/DDoS defense provides the frontline of the security defense. It deal with the massive attack and malicious attacks. The stateful packet inspection firewall ensures that only legal sessions can pass. Service Considerations Activating DoS/DDoS defense functionality might block some legal packet. For example, when activate fraagle attack defense, all broadcst UDP packets come from the Internet are blocked. Therefore, the RIP packets from the Internet might be dropped. More Information about the Configuration Please refer to the DoS/DDoS Manual as a section of the IPFilter/Firewall chapter.
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