Firewalla Blue is a Simple, Affordable and Powerful solution to protect your home and business from cyber threats. It's a little box packed with capabilities, with no monthly fee! ✅ Firewall ✅ Parental Control ✅ VPN Server ✅ Ad Block ✅ Intrusion Detection and Prevention ✅ Bandwidth Usage Monitoring ✅ Plugs into your router. No need to replace it.