1. A system comprising: a firewall installer to configure a firewall, the firewall installer comprising at least one processor programmed to: (A) receive, at the firewall installer, a set of configuration instructions comprising at least one configuration instruction, the set of configuration instructions being in a declarative form that specifies at least one firewall rule to be enforced by the firewall; and (B) configure the firewall, via the firewall installer, to implement the at least one firewall rule.