UPnP

August 19th, 2007

Universal Plug and Play (UPnP) is an architecture for peer-to-peer network connectivity. One of the most important features is the support for automatic service discovery. PeerAware (PA) uses this mechanism for discovering workspaces running on the local network. When a new workspace is started, PA users nearby will automatically discover this and display the workspace on the start page.

How it works is quite simple: Each PA service instance registers a workspace list device that is announced on the local network, and stores a list of active workspaces on the computer. Each PA client instance will search the network for PA workspace list devices and retrieve the list of active workspaces from each. Workspaces discovered are displayed in the local list on the start page.

PA will also use UPnP for controlling IGD compatible devices. Internet Gateway Devices (IGD) like ADSL modems and wireless access points are automatically configured for NAT traversal if UPnP is enabled for the gateway device.

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