Abstract:

Introduced a kind of architecture of Intrusion tolerant system for Internet services.As soon as we focus our attention on the intrusion attacks themselves,we cannot expect to develop a general protection mechanism because all attacks are not well-defined and there are always unknown attacks.But intrusion tolerance system technology achieves the security from the other point of view.Intrusion tolerance is the ultimate defense and assumes that unknown or unmitigated vulnerabilities remain in the system.The objective of intrusion tolerance is to maintain acceptable (but possibly degraded) system services when intrusions occur.

Key words: intrusion, tolerance online, services internet