openWRT的上网配置
将网口与路由连接， 首先修改/etc/config/network
config interface net
option ifname "eth0"
option proto "dhcp"然后再修改/etc/init.d/rcs
/etc/init.d/network reload测试：ping www.baidu.com 是无法ping通的，因为系统没配置dns服务。只能ping其ip 地址：
root@(none):/etc/init.d# ping 202.108.22.5
PING 202.108.22.5 (202.108.22.5): 56 data bytes
64 bytes from 202.108.22.5: seq=0 ttl=51 time=41.307 ms
64 bytes from 202.108.22.5: seq=1 ttl=51 time=36.746 ms
64 bytes from 202.108.22.5: seq=2 ttl=51 time=44.290 ms