Serialization of firewall rules with user, device, and application correlation

Distributed firewalls reside at different points across a network. Each distributed firewall can include one or more rules that govern traffic over and/or access to the network. The rules can be discovered, converted into a standardized format, and indexed at a centralized rule database. The rules or data of the rules can be verified. The rules can be certified at the centralized database. The certification process can be based on a direction of traffic to which the rule governs. The certification process may have different levels based on the direction of traffic.