Workplace will check to see if you have your firewall enabled, as per your applicable security policy. Your firewall can protect your computer from unauthorized network access. Having it turned off exposes you to network vulnerabilities. If Workplace indicates that this is turned off, it only takes a few clicks to turn it on.
On a Windows machine, you can open the Control Panel and search for "windows firewall." Open the "Windows Firewall" or "Windows Defender Firewall" setting and select the "turn windows firewall on or off" setting. Then make sure to pick the option to turn it ON!
On a Mac, you can open System Preferences and search for "firewall." This will open the Security and Privacy Pane. Click the lock icon in the bottom left and enter your Administrator username and password. You can then select the option to "Turn on Firewall."
If for some reason you cannot currently enable your firewall to satisfy the device security check, you may be able to contact your local admin or IT support to grant you a one-time exception so you can continue on.
Once your you've got all of your local disks encrypted, refresh the Workplace security checks page or go back to log into your portal. Once resolved, Workplace will indicate that you have passed the check and you can proceed!