Hybrid Network Defense Model Based on Fuzzy Evaluation

Table 1

Types of intrusion.

Category	Type	Activities
0	Normal	Normal
1	Probe	Probes on system vulnerabilities, for example, port scans
2	DoS (Denial-of-Service)	DoS attacks, for example, SYN flooding
3	R2L (Remote-to-Local)	Unauthorized access by remote machine, for example, password guessing
4	U2R (User-to-Root)	Unauthorized access by locally managed accounts, for example, buffer overflow attacks