Add Multi-WAN awareness to UPnP
Eventually it would be nice to allow selection of the WAN-type interface used by miniupnpd. Right now it's hardcoded as WAN.
If it can be made to operate on two WAN-type interfaces, that would be ideal, but failing that it would be good to have a selector to choose which WAN is used when more than one is available.
#1 Updated by Seth Mos about 7 years ago
upnp is already multi interface aware afaik. I know it can atleast use multiple LAN connections. Might need to check if it support binding to multiple outside addresses as well.
Just making upnp add rules for both WAN interfaces is doing the simplest thing here, considering you are opening up a port on your router anyhow, it might as well be both.
#3 Updated by Jim Pingle about 4 years ago
There is a MULTIPLE_EXTERNAL_IP option in miniupnpd that allows you to specify multiple external IP addresses, and then map them based on the local client like so:
That maps traffic from 192.168.0.1/24 to the external IP of x.x.x.100.
The dist config seems to suggest that using multiple ext_iface lines will work, and a quick experiment suggests that does work as well, but it doesn't add the mappings to all interfaces, only the last one listed, so it may not be quite that easy.
See also #2743