Issue with keep server of radius on

[yiyongyun]

When I use "radiusd -X" command in TeraTerm on remote pc to start up the server of radius,
If I keep the TeraTerm openning, the radius server can work well, it means that the client can receive response of request well.
But if I close the TeraTerm, then the client can not receive response of request any longer. 
How can I solve this problem or how can I keep the radius server on whenever the TeraTerm is openning or closing.
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