Chapter 2 Advanced Routing for FortiOS 5.0 : Advanced Static Routing : Static routing example : Get your ISP information such as DNS, gateway, etc.
  
Get your ISP information such as DNS, gateway, etc.
Your local network connects to the Internet through your Internet Service Provider (ISP). They have IP addresses that you need to configure your network and routing.
The addresses needed for routing are your assigned IP address, DNS servers, and the gateway.