Use a FIREWALL not a router. If it costs you $30 then it’s a router despite what the sales person tells you. All a router does is “network address translation”. It changes your public IP address to a private ip address in your network; so that you can see all your devices on your internal network. If you are a business with any kind of value, you need to have a unified threat management firewall. So if you are not paying for immediate security updates your firewall is not worth the plastic it is in. One step further is if it includes sandbox technology that provides advanced threat detection that stops unknown and zero day attacks at the entrance to your network. The sandbox executes suspicious activity and analyzes the behavior providing comprehensive visibility to the malicious activity, while resisting the intrusion and maximizing zero-day threat detection.