Configuring a Default Gateway
In the previous section, you saw how to manually configure an Ethernet network interface with a particular address and mask. You can connect to networks outside your subnet by adding a default gateway to your kernel's IP routing table with this command:
route add default gw gw-address
The gw-address parameter is the IP address of your default gateway; it must be an address in a locally connected subnet defined by the address and mask settings of your network interface (as described in the previous section). If you have a static IP address, a default route setting usually goes along with an ifconfig command in your boot sequence. For other kinds of connections, other programs usually set the default route.
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