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"Once upon a time, in the land of IP, there was a wide area network (WAN) providing connectivity between clients and servers, and all was well. Then, suddenly, bad things started to happen, and paranoia spread throughout the land. Firewalls grew around hamlets to protect them from the unknown beyond the realm of calm, but then packets were forced to travel thorough the dark forests of the WAN. There was a need to provide them with protection."
"Once upon a time, in the land of IP, there was a wide area network (WAN) providing connectivity between clients and servers, and all was well. Then, suddenly, bad things started to happen, and paranoia spread throughout the land. Firewalls grew around hamlets to protect them from the unknown beyond the realm of calm, but then packets were forced to travel thorough the dark forests of the WAN. There was a need to provide them with protection."