What Is upnptool? Everything You Need to Know

To fix common UPnP tool connection errors (such as “No Internet Gateway Devices Found”, “Port Mapping Failed”, or discovery timeouts), you must ensure that UPnP is globally active on your router, your local firewall allows SSDP traffic on port 1900, and your network is free from Double NAT/CGNAT routing conflicts. Bungie Help UPnP, Port Forwarding, and NAT Types – Bungie Help