D-Link DFL-600 Manual page 35

protocol that the application on the DMZ
computer will use. ~user defined~ allows you
to manually enter the TCP or UDP port number
that the application will use to connect to the
Internet. The remaining protocols in the list
have the appropriate TCP or UDP port number
already entered. These are the most commonly
used protocols in use by applications. For
example, the SMTP (Simple Mail Transfer
Protocol) is commonly used by e-mail programs.
smtp uses TCP port 25.
You can make multiple protocol entries for a
single DMZ computer.
This allows you to enter the TCP or UDP port
Port Number
number manually, when the ~user defined~
protocol option is used.
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