More than 150,000 Internet-facing printers were scanned, located, and used.Security Flaws in Universal Plug and Play: Unplug, DonвЂ™t Play.Report by : SecurityFlawsUPnP.pdfДЁ1 million routers found to have UPnP enabled on their public interfaces.UPnP-enabled routers allow attacks on LANs.Go to GRC.comВ > Services Menu > ShieldsUP!.Check if your router has UPnP, or any other ports/protocols, exposed to the Internet: This behavior is supposed to help when certain applications have difficulty communicating with the Internet, but could be a problem if a malicious program or intruder, like a trojan horse, wants to gain access to your network and computers. When UPnP is enabled on your router, usually by default, some programs can open ports on your router without notification. I recommend that you disable UPnP on your router and manually make port forwarding changes only when necessary. NAT traversal allows network devices or peer-to-peer applications to traverse a NAT gateway by dynamically opening and closings ports for communication with outside services. Then the applications can learn the shared, globally-routable IP address, and configure port mappings to forward packets from the external port of the NAT to the internal port used by the application-and all automaticallyВ so the user doesnвЂ™t have to manually configure port mappings. NAT traversal technology allows network applications to detect that they are behind a UPnP-enabled NAT device.

Enable or disable upnp on router