DDOS服务
DDoS攻击防护服务可对以下类型进行防护
（1）带宽占用性攻击
地址伪造及非伪造型洪泛攻击 TCP Flag (SYN, SYN-ACK, ACK, FIN)/ICMP/UDP/Examples: SYN Flood, Smurf, LAND, UDP Flood
（2）傀儡机攻击
1.Each zombie or bot source opens multiple TCP connections
2.Each zombie or bot source opens multiple TCP sessions and issue repetitive HTTP requests
（3）DNS攻击
DNS Request Flood
（4）大数据攻击
1.Fragmented Packets
2.Large Packets
Examples: Teardrop, Ping-of-Death
（5）低速傀儡机攻击
1.Similar to Bandwidth consumption attacks except that each attack source sends multiple
2.Requests：at low rate
3.DNS Recursive Lookup
