Todjaeger
Potstirrer
The description of a fortress is not entirely accurate. A fortress is indeed some form of prepared defensive position, however, very often is was not done to protect something specific inside, but to control areas or lines of transit and communication. Take a look at some of the coastal fortifications built to defend England by Henry VIII, or the various harbour defences built to protect US ports. While such facilities are obsolete now, when they constructed, the various fortresses and batteries were to provide access denial options for the defenders.I think the analogy is accurate Bonza. A fortress is simply a position which has been heavily fortified to aid in its defense. One of the reasons for such a thing would be to defend what was inside. While the discussion here is definitely focused on the physical, your thought is an interesting one. Many aspects of war have changed so much in recent history, perhaps a new conception of what a "fortress" is, or could be, should be explored.
In terms of cyberwarfare, the notion of a 'fortress' in anything resembling the classical sort of definition becomes much more difficult. For one thing, what is the purpose of the 'cyberfortress'? Is it an access control/denial mechanism to determine the ability to send/receive information? Is it a data storage and retention system, with restricted access to said data? This then moves onto the scope of the 'cyberfortress' does it cover a single terminal/workstation? A small LAN or workgroup? Or perhaps a WAN or national/international network? Moving on further still, what sort of interaction does the 'cyberfortress' allow or prevent? Given that this is an internet forum, the notion of computers connecting via a network should be obviously understood, along with the potential for malacious software. What about other forms of SIGINT and EA? Is a 'cyberfortress' going to be Tempest shielded? Or perhaps protected by a Faraday cage to guard against EA and/or RF interference?
It is a complex question (and therefore a complex and expensive problem) with a myriad of different potential requirements and solutions. Which naturally often conflict with each other.
-Cheers