iputils

func IsPrivateIP ¶

func IsPrivateIP(ip net.IP) bool

IsPrivateIP returns true if ip is in a private, loopback, link-local, or otherwise non-routable range Addresses in the CGNAT range (100.64.0.0/10) and Tailscale ULA subset (fd7a:115c:a1e0::/48) are treated as routable, because they are used as legitimate cross-host address space by overlays like Tailscale A nil or zero-length ip yields false, matching the behavior of net.IPNet.Contains