| Publisher | Osaka University | ||
|---|---|---|---|
| Format | 756.2KB PDF | Date added | 10 Nov 2004 |
| Topics | TCP - IP, Network Security, Denial of Service | ||
| Downloads | 289 | ||
Distributed denial-of-service attacks on public servers have recently become more serious. More are SYN Flood attacks, since the malicious attackers can easily exploit the TCP specification to generate traffic making public servers unavailable. To assure that network services will not be interrupted, the author needs faster and more accurate defense mechanisms against malicious traffic, especially SYN floods. One of the problems in detecting SYN Flood traffic is that server nodes or firewalls cannot distinguish the SYN packets of normal TCP connections from those of SYN Flood attack. Moreover, since the rate of normal network traffic may vary, one cannot use an explicit threshold of SYN arrival rates to detect SYN Flood traffic.
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