Motorola 7.7.4 用户手册

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页码 351
13
Wide Area Network Termination
Your network may change address with each connection making it more difficult to 
attack.
When you configure Instant On access, you can also configure an idle time-out value. Your 
Gateway monitors traffic over the Internet link and when there has been no traffic for the 
configured number of seconds, it disconnects the link. 
When new traffic that is destined for the Internet arrives at the Gateway, the Gateway will 
instantly re-establish the link.
 
Your ser vice provider may be using a system that assigns the Internet address of your 
Gateway out of a pool of many possible Internet addresses. The address assigned varies 
with each connection attempt, which makes your network a moving target for any attacker.