What is a firewall?
A firewall helps protect you against unwanted outside connections to your computer. Everyone on the Internet should use a firewall in addition to anti-virus and spyware removal software.
Why do I need a firewall?
A firewall helps you block unwanted connections to open network ports on your computer. You might open a port on purpose, but a port can also be opened by a virus or worm, without your knowledge. Once a port is opened, a stranger may be able to take control of your computer, or your computer may be used to spread viruses and other malware.
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Will a firewall get in my way?
- We recommend the built-in firewalls for all Windows and macOS systems.
- If you choose instead to use a third-party firewall, you may find it more restrictive and/or intrusive.
Where do I get a firewall?
WINDOWS 10/11
The Windows firewall should be enabled by default.
See this page for instructions
macOS has a built-in firewall that is NOT turned on by default but it is recommend that you turn it on.