1. A method comprising: receiving an inbound message comprising a Uniform Resource Locator (URL) directed to a content or service of a particular content provider; configuring a firewall according to a first set of firewall protections and a different second set of firewall protections defined by the particular content provider; replicating the inbound message, wherein said replicating produces at the firewall a first copy and a second copy of the inbound message; and protecting the content or service of the particular content provider from attacks in the inbound message violating the first set of firewall protections while contemporaneously testing the second set of firewall protections against the second copy of the inbound message resulting from said replicating.