How to enable your router's built-in firewall

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FirewallsHigh priority

About 15 minutes to complete

Most routers include a built-in firewall that filters incoming traffic. Check that it is switched on.

Step-by-step guide

Log in to your router's admin page (the address and default login are usually on a sticker on the router; often 192.168.1.1 or 192.168.0.1).
Look for a 'Firewall', 'Security', or 'Advanced' section.
Confirm the firewall is enabled. On most routers it's already switched on by default, so you may not need to change anything, just confirm.
Save settings if you made a change.

4 steps

Why this matters

A router firewall is your first line of defence. It blocks unsolicited connection attempts from reaching your devices.

How to confirm it worked

The setting is saved and active on your device
You have tested it works before closing the page

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Frequently asked questions

What does a router firewall actually do?

Your router firewall acts as a barrier between your home network and the internet. It blocks unsolicited connection attempts from reaching your devices, so if someone online tries to connect directly to your computer or smart device, the firewall stops them before they get through.

Is the router firewall already on by default?

Usually, yes. Most routers have the firewall enabled by default. However, it is worth logging into your router's admin page to confirm, as settings can sometimes be changed by previous users or by a broadband provider's engineer.

Do I still need antivirus software if I have a router firewall?

Yes. A router firewall and antivirus software serve different purposes. The firewall blocks unwanted inbound connections from the internet. Antivirus protects against threats that reach your device through normal browsing, email, or downloads. You need both.

Will enabling the firewall slow down my internet connection?

No. For home users, a router firewall has no measurable effect on broadband speed. The performance overhead of a basic firewall on modern router hardware is negligible.

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