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Posted by David Sherman [216.18.131.154] on Saturday, August 29, 2009 at 16:31:23 :

In Reply to: Easy posted by Will (in IL) [98.214.244.154] on Friday, August 28, 2009 at 16:53:22 :

Shut down the nameservers. Without a nameserver, you have to know the actual IP address of the site you're trying to connect to. There are very few nameservers. They're very well secured, but now and then they have trouble with one and it's a mess. If you typed in "dodgepowerwagon.com" and nothing came up, would you know the real IP address and try it, or would you just figure the site (or the whole Internet) was down?

The Internet (Arpanet) was designed to be resilient to nuclear attack, but that was when all the connection went by telephone rather than high-speed fiber, and could be re-routed easily around bad spots. Also, in the Arpanet days, before the "www", only big companies were connected and their sysadmins probably had the important IP addresses written on a piece of paper, if not in a local file.

The modern Internet, like the cell phone network, and like telephones, which now actually send almost all their calls over the Internet, is really extremely fragile. It's the first thing to give out in any emergency and the last thing to get fixed (well, maybe it's tied with cable TV)

All the important (i.e. DoD) government stuff runs on its own "Internet". Yes, they use Internet Protocol, but they have their own physical network and routers. Nobody from the public Internet can hack into it because the wires aren't even connected. The .gov and .mil sites that you see, even the password-protected ones, are for low-security information only. If push comes to shove, as in civil unrest, the government can quickly shut down the public Internet and still keep its own internal Internet up and running.

That said, shutting down the Internet will kill most modern businesses and the economy, and at least the bigger businesses (e.g. banks) have lots of pull with the government, so I don't think it's likely that they'll shut the Internet down in any but the most dire circumstances.



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