[b]1、运行命令ifconfig查看当前网卡列表，确定名称，如果不在列表内，可能是驱动没装好[/b] % ifconfig dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 192.168.1.3 netmask 0xffffff00 broadcast 192.168.1.255 ether 00:a0:cc:da:da:da media: Ethernet autoselect (100baseTX <full-duplex>) status: active dc1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 inet 10.0.0.1 netmask 0xffffff00 broadcast 10.0.0.255 ether 00:a0:cc:da:da:db media: Ethernet 10baseT/UTP status: no carrier lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 inet 127.0.0.1 netmask 0xff000000 tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500 [b]2、vi /etc/rc.conf 添加[/b] ifconfig_dc0="DHCP" dhcp_program="/sbin/dhclient" dccp_flags="" [b]3、reboot后，应该就可以用了[/b]