User`s guide

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Interface Binding - SMTP (Simple Mail Transport Protocol) Binding
Unless you are using E-mail accounts from different ISPs on each port, you can ignore these
settings.
Some ISPs configure their E-mail Servers so they will not accept E-mail from IP addresses
not allocated by them. If you are using accounts from different ISPs, sending E-mail over the
wrong WAN port may result in non-acceptance of the mail. In this case, you can use these
settings to correct the problem.
• Enable - If enabled, the WAN port you specify below will be used for all outgoing SMTP
traffic. If not enabled, either WAN port will be used.
• WAN – Select the desired WAN port to be bound.
Protocol and Port Bindings - Use these settings if you wish to ensure that particular traffic
is sent by a particular WAN port, and thereby a particular ISP account.
• Enable - Enable or disable each item as require
• Source IP - IP address of source which packets are sent from.
• Destination IP – IP address of destination which packets are sent to.
• Subnet Mask – With subnet mask other than 255.255.255.255, you can make an IP sub-
network as your destination.
• Protocol – Select protocol type used by the traffic you wish to configure.
• Port Range - Enter the beginning and end of the port range used by the traffic you wish to
configure. If only a single port is used, enter the port number in both fields.
• WAN - Select the WAN port you wish this traffic to use.
Protocol and Port Binding List - This list shows the details of all protocol and port configuration data
which are currently defined. You can modify them by mouse clicking some row.