Re: WMFSDK attempting to map ports through UPnP?

On Feb 14, 6:12 pm, "Alessandro Angeli" <nob...@xxxxxxxxxxxxxxxxxx>
wrote:
From: "Jeremy Noring"

1. Is this documented anywhere? I can't find any
documentation on the WMFSDK attempting to map ports
through UPnP.

My guess is that it doesn't have anything to do with WMF.
The network sink simply opens a local port for listening.
However, if the UPnP service is enabled, it will map this
local port on the UPnP firewall.

I doubt this because of the string. "Windows Media Format SDK
(executable name)" is pretty specific; if it is the local UPnP
service, then how does it know it's the WMFSDK that's doing the
mapping? I would be less skeptical were it some play on the
executable name, but it seems unlikely that the local UPnP service
would be aware that it's the SDK doing the mapping.

I suppose it could be a play on one of the WMFSDK dll's description
attributes in conjunction with the application name, but I have yet to
find this string present in any of the WM dll's in system32 (not sure
what to make of this).

AFAIK, the local UPnP service is exposed through an API to map ports,
but it doesn't automatically map ports simply because an application
starts listening:

http://msdn2.microsoft.com/en-us/library/aa366187%28VS.85%29.aspx
http://www.codeproject.com/KB/IP/PortForward.aspx#Rant


2. How do I disable it?

Try to stop/disable the UPnP system service.

I'll give this a try, and let you know what the results are.
.

Relevant Pages

  • Re: WMFSDK attempting to map ports through UPnP?
    ... documentation on the WMFSDK attempting to map ports ... The network sink simply opens a local port for listening. ... However, if the UPnP service is enabled, it will map this ... Try to stop/disable the UPnP system service. ...
    (microsoft.public.windowsmedia.sdk)
  • Re: uPnP ... MSN Messenger
    ... uPnP is not such a good idea to have switched on? ... >>firewall and also run software firewalls on the local ... >>having audio is a nuisance. ... >don't forward any ports related to the UPnP service to this computer, ...
    (comp.security.misc)
  • Re: UPnp and Windows 2000?
    ... have you checked to see if the upnp service is running? ... Is there any configuration the end user has to perform for enabling ... Is there any known problems w/ windows machines and MSN service pac's? ...
    (microsoft.public.win2000.general)