Introduction: Locking the Backdoor
If you look at any 'Top 10 Tips for Network Security' list, Disabling UPnP is almost always at the top. It’s the easiest way to significantly harden your home network against automated attacks. In this guide, we'll explain why this one simple click makes such a big difference.
The 'Manual' Alternative
People use UPnP because they don't want to learn how to do Port Forwarding. But doing it manually is much safer. When you manually open a port, you know exactly which device it goes to and why. With UPnP, the router is just letting anyone walk in through a back door.
Conclusion
Go into your router's 'Advanced' settings today and turn off UPnP. Your future self will thank you for the extra security. Verify your UPnP status here.
Enterprise alignment
NIST-style baselines recommend disabling IGD on corporate CPE and SSIDs. Guest networks should never expose SSDP/IGD across VLAN boundaries.