I’ve also wanted to use upnpd with more than one internal interface, but
unfortunately libupnp seems to be fundamentally broken when used in a
multihomed environment. Consequently, I don’t think it’s possible for linux-igd
to support this without first rewriting parts of libupnp to properly support
multihoming.
Nonetheless, I’ve developed a workaround. Using dummy0 as the internal
interface, and with proper multicast routing, upnpd will receive and respond to
SSDP search requests from any interface. The trick is to modify each response
so that the LOCATION field matches the IP address of the interface on which
each response is sent, as required by the UPnP standard.
I wrote a proxy daemon to do this:
https://github.com/verement/upnp-proxy
I’ve been using this for a few months now and it seems to be working as
intended. YMMV.
Cheers,
--
Rob Leslie
r...@mars.org
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