Harry is pretty much dead on. I am just about sure that the IP of in 192.168.###.### and the gateway of 10.###.###.### are incompatiable and will not work. As for Dell optiplex machines (as low as Optiplex with 75Mhz Pentium 1 & as high as GX280) & the 3C905B-TX Fast Ethrlink XL PCI, I will state that I have used Linux on them for more than 7 years now and have noticed no incompatibilies.