Firewall rule conflict discovery algorithm;

Under the existing legal system,we could try to realize the perfect coordination between certainty and flexibility in conflict rules for torts.

However, there is no widely accepted substantive convention and uniform conflict rules.

This article firstly analyzes the causes of the conflicts of the international anti-monopoly rules and then,briefly reviews and appraises the developing theories and legislations about settlements to the conflicts, especially on the conflict rules.

Current test algorithms only choose test packets from apexes of added or deleted rules,which cannot detect deployment errors caused by rule conflicts.

Based on the characteristics of collaborative design and RBAC(role-based access control) model,a new model named MDACM(message-driven access control model) is developed to solve security problem due to the distributivity and dynamic ability of collaboration through an authority that is expressed by a message entity or integrated message entity in combination with filter rule,then control by s.

Because every level firewall manager can add the filter rules.

The thesis mainly focus on configuration and control software, explores performances of large-scale filter rules, management and implements the function in the system to auto-manage rules from remote.

The bottleneck of the packet filter method is produced due to a large number of filter rules to be checked.