Firewall configuration Adding firewall policies
FortiGate-400 Installation and Configuration Guide 175
Traffic Shaping
Traffic Shaping controls the bandwidth available to and sets the priority of the traffic
processed by the policy. Traffic Shaping makes it possible to control which policies
have the highest priority when large amounts of data are moving through the
FortiGate device. For example, the policy for the corporate web server might be given
higher priority than the policies for most employees’ computers. An employee who
needs unusually high-speed Internet access could have a special outgoing policy set
up with higher bandwidth.
If you set both guaranteed bandwidth and maximum bandwidth to 0 the policy does
not allow any traffic.
Authentication
Select Authentication and select a user group to require users to enter a user name
and password before the firewall accepts the connection. Select the user group to
control the users that can authenticate with this policy. To add and configure user
groups, see “Configuring user groups” on page207. You must add user groups before
you can select Authentication.
You can select Authentication for any service. Users can authenticate with the firewall
using HTTP, Telnet, or FTP. For users to be able to authenticate you must add an
HTTP, Telnet, or FTP policy that is configured for authentication. When users attempt
to connect through the firewall using this policy they are prompted to enter a firewall
username and password.
If you want users to authenticate to use other services (for example POP3 or IMAP)
you can create a service group that includes the services for which you want to
require authentication as well as HTTP, Telnet, and FTP. Then users could
authenticate with the policy using HTTP, Telnet, or FTP before using the other service.
Allow inbound Select Allow inbound so that users behind the remote VPN gateway can
connect to the source address.
Allow outbound Select Allow outbound so that users can connect to the destination address
behind the remote VPN gateway.
Inbound NAT Select Inbound NAT to translate the source address of incoming packets to
the FortiGate internal IP address.
Outbound NAT Select Outbound NAT to translate the source address of outgoing packets to
the FortiGate external IP address.
Guaranteed
Bandwidth
You can use traffic shaping to guarantee the amount of bandwidth available
through the firewall for a policy. Guarantee bandwidth (in Kbytes) to make
sure that there is enough bandwidth available for a high-priority service.
Maximum
Bandwidth
You can also use traffic shaping to limit the amount of bandwidth available
through the firewall for a policy. Limit bandwidth to keep less important
services from using bandwidth needed for more important services.
Traff ic Pri ority Select High, Medium, or Low. Select Traffic Priority so that the FortiGate unit
manages the relative priorities of different types of traffic. For example, a
policy for connecting to a secure web server needed to support e-commerce
traffic should be assigned a high traffic priority. Less important services
should be assigned a low priority. The firewall provides bandwidth to low-
priority connections only when bandwidth is not needed for high-priority
connections.