Web guide
Web guide

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

Web guide

1.5.3 Firewalls

A firewall is a barrier between your computer and the rest of the Internet. It monitors data passing between your computer and the Internet and checks it against a set of ‘rules’. The rules you set up will protect you from hackers (people who try to access other computers illegally) and the programs they write, such as worms and viruses.

The Open University Maths and Computing [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] Faculty's Safe Computing site has links to free personal firewall programs. Some Internet Service Providers (ISPs), like BT and AOL, also provide a free copy of a firewall program to their customers.


Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus