Cargo Features

[dependencies]
external-ip = { version = "5.2.0", default-features = false, features = ["discover_igd"] }
default = discover_igd

The discover_igd feature is set by default whenever external-ip is added without default-features = false somewhere in the dependency tree.

discover_igd default = igd

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

igd discover_igd