1. A method for automatically generating one or more rules during IT transformation for configuring one or more firewall interfaces in a post-transformation target environment, the method comprising: obtaining at least one communication pattern occurring in a pre-transformation source environment; and automatically generating one or more vendor-neutral rules for one or more intended firewall interfaces in a post-transformation target environment based on the at least one communication pattern occurring in the source environment and based on information derived from the target environment; wherein at least one of the steps is carried out by a computer device.