I have been amazed how many managers are surprised to find out that they are already connected. Engineers always seem to find a way. Not entirely true. Of course qualified people will not be interested in testing a system based on speculation and they are not cheap, but then you get what you pay for. I am either too lazy or busy to hunt this one down.
Approximate representation follows.
We are also looking for similar documentation. Thank you to all who would assist. I think that another interesting point in the firewall book is that the authors are so anti-hacker in their book, it makes reading difficult. The mere fact that companies think that if they don't know about the security problems means that no one else does is a problem. It allows blocking destinations, blocking forwarding, etc, and is free.