Wireless networking security

Wireless networks are more open to threats than wired ones. Anyone within range can attempt to connect or intercept data, so it is important to build security into your setup from day one to safeguard your business.

Wireless networks rely on security measures like built-in encryption (such as Wi-Fi Protected Access or WPA) and virtual private networks (VPNs) to block unauthorised access. These tools are widely available but must be set up correctly to protect your data.

How to protect your wireless network

There are several vital measures you can put in place to help protect your network. As a bare minimum: 

• You should password-protect your wireless local area network and activate built-in data encryption, such as WPA3. Most products support these features - make sure they are enabled and reset default passwords on setup.
• Use strong passwords that cannot easily be guessed. Keep them over 20 characters long, mixing letters, numbers and symbols. Avoid common words, names or memorable dates. Find password strategies to help keep your business secure.
• Train employees on the importance of IT security to prevent basic errors.
• Choose hardware that supports upgrades, as security standards evolve quickly. Check for the latest WLAN standards before buying hardware.
• Use VPNs for added protection, especially on public Wi-Fi. 

See computer networks and guidance on deploying Internet Protocol Security (IPsec) to establish VPNs.

Common Wi-Fi security issues and fixes

Here are some common Wi-Fi risks and up-to-date best practices to address them:

Lost or stolen devices

If your device is lost or stolen, remotely revoke access and any privileges associated with usernames and passwords to secure the network. Wipe data, if possible, and report the incident to your IT team or provider immediately.

Public hotspots

On public hotspots, use personal firewall software to control data exposure, but always prioritise a VPN to encrypt traffic. Also, avoid auto-connect features, stick to HTTPS sites with two-factor authentication (2FA) where possible, and disable file sharing and peer-to-peer connections.

Malware threats

Install and update anti-malware software on all devices to block trojans, spyware and ransomware. Enable real-time scanning and restrict unapproved app downloads.

Staff handling sensitive data

Provide regular training to staff on phishing recognition, secure Wi-Fi habits and device locking. You can also consider enforcing policies like screen locks, OS updates and no public Wi-Fi for confidential work.

Read more about securing your wireless network.