US Patent 8468113 Method and system for management of security rule set

There are provided a method of automated managing two or more security rule-sets and a system thereof. The method comprises: obtaining data characterizing a first rule-set and a second rule-set; automated recognizing all possible combinations of values in the first and the second rule-sets; automated verifying each combination of values in the second rule-set against the first rule-set; calculating one or more values characterizing the differences in allowable and rejectable traffic in the first rule-set and the second rule-set; automated comparing the calculated values and/or derivatives thereof with a predefined threshold; and automated classifying the relationship between the first rule-set and the second rule-set in accordance with comparison results. The method may further comprise obtaining a connectivity request; automated verifying each combination of values in the connectivity request against the first rule-set and the second rule-set; and automated classifying the second rule-set with regard to the connectivity request, wherein the second rule-set comprises extra allowable traffic resulting from amending the first rule set.