Configuring the management interface (Transparent mode) | Network configuration |
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Note: You cannot set MTU size if the external interface is configured using PPPoE. The PPPoE protocol configures optimum MTU size.
To change the MTU size of the packets leaving the external interface:
1Go to System > Network > Interface.
2For the external interface, select Modify 
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3Select Fragment outgoing packets greater than MTU.
4Set the MTU size.
Set the maximum packet size in the range of 68 to 1500 bytes. The default MTU size is 1500. Experiment by lowering the MTU to find an MTU size for best network performance.
Configuring the management interface (Transparent mode)
In Transparent mode, you can configure the management interface for management access to the FortiGate unit.
1Go to System > Network > Management.
2Change the Management IP and Mask as required.
This must be a valid address for the network from which you will manage the FortiGate unit.
3Add a default gateway IP address if the FortiGate unit must connect to a default gateway to reach the management computer.
4Select the management Access methods for each interface.
By default in Transparent mode, you manage the FortiGate unit by connecting to the internal or dmz interface. However, you can configure the management interface so that you can manage the FortiGate unit by connecting to any interface.
HTTPS To allow secure HTTPS connections to the
PING If you want the management interface to respond to pings. Use this setting to verify your installation and for testing.
HTTP To allow HTTP connections to the
SSH To allow secure SSH connections to the CLI using the management interface.
SNMP To allow a remote SNMP manager to request SNMP information by connecting to the management interface. See “Configuring SNMP” on page 134.
TELNET To allow Telnet connections to the CLI using the management interface. Telnet
connections are not secure and can be intercepted by a third party.
5Select Apply to save your changes.
114 | Fortinet Inc. |
