Port forwarding fails with error 606 from router

[adolfintel]

I recently downloaded Warzone 2100, which uses miniupnpc, and I noticed that it couldn't open port 2100 on my FritzBox 3470 despite UPnP being enabled.

I know for sure that UPnP works fine on my router because I developed a UPnP library for Java and it works fine. I don't know why miniupnp does not.

I investigated the problem a bit and this is what happens when the game tries to open the port:

Link to the original issue: Warzone2100/warzone2100#476

[miniupnp]

606 is the error code for "Action Unauthorized"
Are you sure le port 2100 is free ? and that 192.168.1.199 is the IP of the machine.

What's the list of the current portmappings ?

[adolfintel]

These are the current port mappings:

As far as I can tell, nothing is using port 2100. I really don't know why it can't open it.

Is there anything I can do to debug this further?

[miniupnp]

can you open a port mapping on port 2100 with another UPnP IGD client ?

[miniupnp]

if that works, you could then compare the 2 SOAP requests.

[adolfintel]

It seems that this 606 error pops up on a bunch of random ports, not just 2100. I'll ask the router manufacturer, maybe it's a bug introduced in the update that came out a few days ago.