配置雙網卡，電信聯通通外網。配置路由。 前提第二張網卡不能添加網關，不然重啓network 就起不來了。
echo "250 CTC" >> /etc/iproute2/rt_tables ##電信路由表
echo "251 CNC" >> /etc/iproute2/rt_tables ##聯通路由表
echo "251 CM" >> /etc/iproute2/rt_tables ##移動路由表
echo "ip route add default via 183.131.23.129（電信網關） table CTC" >> /etc/rc.d/rc.local
echo "ip rule add from 115.231.103.68（電信IP） lookup CTC" >> /etc/rc.d/rc.local
echo "ip route add default via 101.71.29.65 （聯通網關）table CNC" >> /etc/rc.d/rc.local
echo "ip rule add from 101.71.29.69（聯通IP） lookup CNC" >> /etc/rc.d/rc.local
echo "ip route add default via 101.71.29.65 （移動網關）table CNC" >> /etc/rc.d/rc.local
echo "ip rule add from 101.71.29.69（移動IP） lookup CNC" >> /etc/rc.d/rc.local
你先加到rc.local
ip route add default via 183.131.23.129 table CTC
ip rule add from 183.131.23.134 lookup CTC （電信ip）
ip route add default via 223.95.78.65 table CMCC
ip rule add from 223.95.78.91 lookup CMCC (移動ip)