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Port Mapping Issues

UPnP, NAT-PMP, or port mapping is disabled or unavailable on the router

First, confirm that your router supports UPnP (also called NAT-PMP or simply port mapping). Refer to your hardware documentation to learn how to activate this feature. If UPnP is not available on your router, you must perform a manual configuration.

If you have more than one router on the same network, confirm that one of them is set to Bridge Modeand that all of them support UPnP. (Note that some modems also act as routers.)

Some manufacturers advertise their hardware as UPnP- or NAT-PMP-compatible, but some routers use buggy UPnP implementations. If you seem to be experiencing issues with your router's automatic configuration, try mapping the port manually.

Screens Connect displays a "port mapping failed" error

First, try rebooting the router and the Screens Connect computer. This will often resolve temporary connectivity issues.

Screens Connect displays this error under the following circumstances:

Considerations

If you're running Screens Connect on a computer which is accessing the Internet through a wireless "hot-spot" (e.g. iPhone with Personal Hotspot enabled), Screens Connect will be unable to automatically map a port, and will display this error.

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