Fortinet FortiGate 110C - Manual (Page 24)

FortiGate-110C FortiOS 3.0 MR6 Install Guide
22 01-30006-0481-20080728
Configuring NAT mode Configuring
To set an interface to use PPPoE addressing
config system interface
edit external
set mode pppoe
set username
set password
set ipunnumbered
set disc-retry-timeout
set padt-retry-timeout
set distance
set defaultgw {enable | disable}
set dns-server-override {enable | disable}
end
The CLI lists the IP address, netmask, and other settings for each of the FortiGate
interfaces.
Configure a DNS server
A DNS server is a service that converts symbolic node names to IP addresses. A
domain name server (DNS server) implements the protocol. In simple terms, it
acts as a phone book for the Internet. A DNS server matches domain names with
the computer IP address. This enables you to use readable locations, such as
fortinet.com when browsing the Internet.
DNS server IP addresses are typically provided by your internet service provider.
To configure DNS server settings
config system dns
set autosvr {enable | disable}
set primary
set secondary
end
Note if you set the autosvr to enable, you do not have to configure the primary
or secondary DNS server IP addresses.
Adding a default route and gateway
A route provides the FortiGate unit with the information it needs to forward a
packet to a particular destination. A static route causes packets to be forwarded to
a destination other than the default gateway. You define static routes manually.
Static routes control traffic exiting the FortiGate unit-you can specify through which
interface the packet will leave and to which device the packet should be routed.
In the factory default configuration, entry number 1 in the Static Route list is
associated with a destination address of 0.0.0.0/0.0.0.0, which means any/all
destinations. This route is called the "static default route". If no other routes are
present in the routing table and a packet needs to be forwarded beyond the
FortiGate unit, the factory configured static default route causes the FortiGate unit
to forward the packet to the default gateway.
Note: If you change the IP address of the interface you are connecting to, you must
connect through a web browser again using the new address. Browse to https:// followed by
the new IP address of the interface. If the new IP address of the interface is on a different
subnet, you may have to change the IP address of your computer to the same subnet.