[FreeNX-kNX] The authentificity of host ... can't be stablished....

[olaf]

Hi!

Booting thinstation via pxe to the nomachine-client-login,  write username + 
password, press ok, every time asking
"The authentificity of host SERVER-IP can't be stablished.
The RSA key fingerprint is:
37:f3: ......
Are you sure you want to continue connecting?"

Where can I set the fingerprint to the default, so that the user has not shown 
this message?

Bye
Olaf