We have noticed that the 410C running Linux does not accept incoming connections (e.g., ssh) from a computer until you start sending ping from the 410C to the computer.
Pinging from the 410C to a different device on the network does not seem to help, it has to be the same device you want to connect from. So it doesn't seem like a wifi-interface-going-to-sleep issue.
I have seen this problem on two different wifi networks, and two different 410C boards.
Has anyone else noticed this issue? Does anyone know of a solution or likely cause?