I don't think upnp is actually an adequate replacement for this even on routers ...

makomk on July 28, 2015 | parent | context | favorite | on: “We are considering adding an extension to restric...

I don't think upnp is actually an adequate replacement for this even on routers that support it, because many of the older ones don't support NAT hairpinning so even if you open a port on the public IP address using upnp other nodes on the LAN can't connect to it.