FAQ - Security / Firewall
So, should I worry about security issues?
The Internet was created by and is used by people, some of whom are criminals. But, then again, that's not unlike the offline world, is it? That said, some simple precautions -- the online equivalent of locking your front door -- will keep you safe from all but the most determined criminals.
What kind of protection do I need?
A firewall, which monitors your Internet connection and refuses to let anything suspicious in, can provide sufficient protection.
Firewalls come in hardware and software varieties. Hardware firewalls are boxes that you plug your computer into. Many broadband routers and modems now come with built-in firewall protection. Software firewalls are programs that you download from the Internet to your personal computer. These applications scan for hackers, just as anti-virus programs look for bugs that can disable your PC.
How does a firewall work?
It monitors your Internet traffic and compares what's coming in to what's permitted. Most firewalls are set to let Web pages and e-mail pass through, but won't let telnet or ftp requests in, unless the person has a password. A firewall also monitors traffic in the other direction. Some programs called Trojan Horses try to take control of your computer and then send a "mission accomplished" signal to their builders. A firewall won't let this signal be sent from your computer, and will sound an alarm to let you know that something funny is going on.
Some firewalls can block objectionable Internet sites, which helps if you have children, or remove advertisements from Web pages.
What can I do right now to protect myself?
- Get a good anti-virus program and have it scan your computer each week.
- If you have a Microsoft computer, turn off the file-sharing function.
- Don't run a program or open an e-mail attachment without first running a virus scan.
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