
•For the external interface, select Modify .
•Select the management Access methods for the external interface.
HTTPS
PING
SSH
SNMP
To allow secure HTTPS connections to the
If you want the external interface to respond to pings. Use this setting to verify your installation and for testing.
To allow secure SSH connections to the CLI through the external interface.
To allow a remote SNMP manager to request SNMP information by connecting to the external interface. See Configuring SNMP.
Selecting HTTPS for the external interface allows remote administration of the
Selecting SNMP for the external interface allows remote SNMP management of the
•Select OK.
You can control the IP addresses from which administrators can access the
Changing the external interface MTU size to improve network performance
To improve the performance of your internet connection, you can adjust the maximum transmission unit (MTU) of the packets that the
Trial and error is the only sure way of finding the optimal MTU, but there are some guidelines that can help. For example, the MTU of many PPP connections is 576, so if you connect to the Internet via PPP or PPPoE, you might want to set the MTU size to 576. DSL modems also have small MTU sizes. Most ethernet networks have an MTU of 1500.
If the external interface is configured using PPPoE, MTU may be negotiated by the PPPoE protocol. If this is the case, the system may override manual MTU settings.
If you connect to your ISP using DHCP to obtain an IP address for the external interface, you cannot set the MTU below 576 bytes due to DHCP communication standards.
To change the MTU size of the packets leaving the external interface:
•Go to System > Network > Interface .
•For the external interface, select Modify .
•Select Fragment outgoing packets greater than MTU.
•Set 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.
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