MacBook dual NIC Routing

Use the route command to resolve the following steps:
1) determine the network segment of your intranet, if there are more than one listed, for example: 192.168.1.0/24,10.20.0.0/16, etc.

2) Determine your intranet network card gateway IP, through NETSTAT-RT can see, for example: Here the first NIC En0 is the wireless network card, The gateway IP is 10.99.1.1, the second NIC EN4 is the wired network card, the gateway IP is 10.20.1.1, different machines, the network card number may be different.

Assign access to fewer xxx.yyy.0.0 URLs to En0 on this NIC:

/sbin/route add -net xxx.yyy.0.0 -netmask 255.255.0.0 -interface en0

MacBook dual NIC Routing