Methods, systems, and media are shown for generating access control rules for computer resources involving collecting historical access data for user accesses to a computer resource and separating the historical access data into a training data set and a validation data set. An access control rule is generated for the computer resource based on the properties of the user accesses to the computer resource in the training data set. The rule is validated against the validation data set to determine whether the rule produces a denial rate level is below a threshold when the rule is applied to the validation data set. If the rule is valid, then it is provided to an administrative interface so that an administrator can select the rule for application to incoming user requests.