It is illogical to speak of a "reverse firewall". Perhaps these folks also tore a hole in the front of their house next to the "door" so they could also have a "reverse door" to exit by!
Firewalls work both ways, in and out. Which side is "in" and which side is "out" is also just a matter of definition and which network connection you connect to which port.
I think what they meant to discuss is "egress filtering" and this is not by any means a new idea. see "Consensus Roadmap for Defeating Distributed Denial of Service Attacks" at http://www.sans.org/dosstep/roadmap.php from February 2000 for one prior example of this concept.
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It may be of interest for those who want to offer constructive comments on the situation with katie.com that Penguin USA has listed the following toll-free number for "all other concerns": (800) 631-8571. See: http://us.penguingroup.com/static/packages/us/abou t/contact.htm#CONTACT
Firewalls work both ways, in and out. Which side is "in" and which side is "out" is also just a matter of definition and which network connection you connect to which port.
I think what they meant to discuss is "egress filtering" and this is not by any means a new idea. see "Consensus Roadmap for Defeating Distributed Denial of Service Attacks" at http://www.sans.org/dosstep/roadmap.php from February 2000 for one prior example of this concept.