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Manually Configure Internet and WAN Settings
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ProSecure Unified Threat Management (UTM) Appliance
Figure 53.
4. Enter the settings as explained in the following table:
Table 20. Advanced WAN settings
Setting Description
MTU Size
Make one of the following selections:
Default Select the Default radio button for the normal maximum transmit unit (MTU)
value. For most Ethernet networks, this value is 1500 bytes, or 1492 bytes for
PPPoE connections.
Custom Select the Custom radio button, and enter an MTU value in the Bytes field. For
some ISPs, you might need to reduce the MTU. This is rarely required, and
should not be done unless you are sure that it is necessary for your ISP
connection.