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Your internet connection is a channel from the outside world into your computer. If it isn’t secured properly you are vulnerable to someone using it to get to your information or to hijack your connection or computer for their own purposes.
The convenience of having an internet connection that is ‘always on’ or having wireless access to the internet from more than one computer in your home comes with added security risks.
The likelihood that your computer will be targeted by attackers or viruses scanning the network for available or susceptible computers becomes much higher if your computer is always connected.
Having an unsecured wireless network can allow anyone within range—your neighbours or anyone on the street—to access your network or use your internet connection. They could use up your download allowance (possibly resulting in excess usage fees), intercept and read your email or, more seriously, use your account to access illegal content or undertake criminal activities.
Wireless internet security – watch our video on wireless internet security. A text transcript is also available.
If you use a modem/router:
Read more on Securely configuring your broadband modem/router (PDF, 478KB)
Many of the latest computers come with the ability to connect to the internet and other nearby computers without the need for wires or cables, using a wireless connection. Instead of wires or fibre-optic cable, wireless technology uses radio waves and/or microwaves to transmit the data similar to a mobile phone or radio.
If you are using a wireless connection to connect to the internet, or between other computers in your home (i.e. a wireless network), make sure you can protect your connection.