UPnP / NAT-PMP Discovery

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upnp

Input

Optional custom gateway IPv4 list (comma, semicolon, or newline separated).

Output

Selected local interface and subnet context.
Auto-detected gateway candidates and merged probe list.
Custom gateway list (when provided).
UPnP SSDP responses (search target, server, and location URL).
NAT-PMP responses (public address and epoch when available, or no-response/result codes).

Tips

Run this on trusted local networks where you have authorization.
If no local IPv4 interface is available, verify Wi-Fi/cellular connectivity.
In multi-VLAN environments, add known gateway IPs explicitly to target non-default segments.
A non-response does not always mean unsupported; some gateways block discovery traffic.

Deeplink

netdebug://upnp?gateways=192.168.1.1,10.0.0.1

Tip: in the app, open the Export menu (the share icon) on this screen and choose Copy Deeplink to copy this link as a Universal Link with your current target and options already filled in.