I need some help from the guru's on my network setup. It is as follows: (periods for spacing)

.................................Internet
.......................................| gateway **.**.140.1
.......................................| 255.255.252.0
............................cable modem
.......................................|
.......................................|
................................ -----
...............................|
...............................|
...............................|
.............................NIC 1 **.**.141.171
...............................|
...................Windows box--- NIC2-----HUB-----NIC3---Linux box
..................................**.**.141.172 **.**.141.173


I have Internet access on Windows. I don't expect to have Internet on Linux. However, I cannot ping the Windows system (It IS a Hub I am using SMC brand). From the Linux box I get (Network is Unreachable). From Windows box I CAN ping the Linux box. I fear I goofed the Network config somehow on Linux. I don't know how to change my IP settings correctly on it. It is Linux 7.3 and the commands netconf, linuxconf, and netcfg are not recognized. What am I doing wrong? ANY help/informative flames welcome.