Apple AirPort Networks Guía para resolver problemas descargar pdf (Pagina 45)

Secure Your Network

If you use a wired network in your home, someone would have to break

into your house, plug into your Ethernet switch, and then crouch there

in the dark to capture data passing over your network.

Wireless networks have no such protection: anyone with an antenna

sensitive enough to pick up your radio signals can eavesdrop on traffic

passing over your network. This could be a neighbor, someone in a

parked car, or a nearby business. Many free, easy-to-use programs

make this a simple task for only slightly sophisticated snoopers.

However, you’re not powerless to prevent such behavior. Depending

on what you want to protect and whom you’re protecting against, you

can close security holes with tools that range from a few settings up

to industrial-grade protection that requires separate servers elsewhere

on the Internet.

Simple Tricks That Don’t Work

You may have read suggestions for setting up basic security that advise

you to hide your network’s name and make it hard to connect to. In

practice, this doesn’t work.

In a closed network, your base station stops broadcasting its network

name, or SSID (Service Set Identifier), as part of its

beacon, an “I’m

here” message that access points regularly transmit in order to help

clients connect to them. However, the beacon continues to be sent

because it still includes information that is used for network data

synchronization.

An open network appears by name in the Wi-Fi

menu or in other

places in a device’s interface that show the names of networks you can

connect to. But closing the network makes it only slightly obscure.

A cracker can easily find out that the network exists, and by

monitoring for a connection or using a tool to create a disassociation

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Apple AirPort Networks Guía para resolver problemas Pagina 45