ZyXEL Communications P-870HN-51B - V1.0 Manual page 212

Chapter 18 Universal Plug-and-Play (UPnP)
You may edit or delete the port mappings or click Add to manually add port
4
mappings.
Figure 114 Internet Connection Properties: Advanced Settings
Figure 115 Internet Connection Properties: Advanced Settings: Add
When the UPnP-enabled device is disconnected from your computer, all port
5
mappings will be deleted automatically.
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P-870HN-51b User's Guide