Wake on lan on a Imac

Hello

The wake on lan worked perfectly but from 1 week impossible to wake up my imac .

The Ethernet car is configured , The teamviewer is configured too with a public adress with UPD port 9 , My modem BBox 3 is configured to forward the port 9 on ip on my mac ? 

Little precision I used osx high sierra and the error code is kZU9E5/549f6cfc/170518

It' due to the new version on teamviewer ?

regards