Hello, thanks to all of you for your input. I just finished an improved plugin written in perl. It can be found here: http://www.nagiosexchange.org/Hardware.56.0.html?&tx_netnagext_pi1 [p_view]=797 It checks the fan-status from FuSi Server (RX100, ...) Thanks again, Ingo. -- Ingo Lantschner Vienna/Austria Mob (+43-664) 143 84 18