I am using D-Link DFE-530TX+ network card. But I cannot connect to Internet. I use COMCAST cable as my ISP. I tried both RH7.2 and RH7.3. In RH7.3, it seems more promising. The Linux recognized the card automatically and add a line alias eth0 8139too to the /etc/modules.conf. I can see the 8139too module is loaded by "lsmod" command. However, when the system start up or when I issue "/etc/rc.d/../network start" command, I got error when it tries to bring up eth0: Determining IP information... [fail] If I issue "ifconfig eth0 up" I got error: SIOCSIFFLAGS: Device or resource busy. I can ping 127.0.0.1, but if I ping other IP, I got "network is unreachable" error. In the /etc/sysconfig/network-script/ifcfg-eth0 file, I don't know if I have to specify DHCP_HOSTNAME. I called Comcast for the name, they said it is dynamic and they won't give out. I also tried rtl8139.o driver. Actually, the driver for linux in the installation floppy disk is rtl8139.c. But it seems for RH6.0. I cannot make it compiled. I got updated rtl8139.c from website and made it compiled. I can insmod pci-scan.o successfully. However, when I insmod rtl8139.o, I got error: init_module: No such device. Hint: insmod error canbe caused by incorrect module parameters, including invalid IO or IRQ parameters. Can anyone give me help on this problem. Thank you in advanced.