gopinath wrote: > how to simulate a RJ 45 port to act as serial port any option in > Centos 5.1. Please help me out on this. > huh? You'll have to be a WHOLE lot more explicit as to what you want to do here. on x86 hardware, RJ45 ports are almost always ethernet, serial ports generally use DB9 connectors. On some other servers like Sun Sparc and IBM Power systems, RJ45 ports are sometimes used for serial console connections, but those ports are wired up to UARTs (asynchronous communication adapters) rather than ethernet network interface adapters.