DUN stands for Dial-Up Networking. LAN stands for Local Area Network. If you connect to the Internet with a regular phone modem you are using Dial-Up networking. If you connect to the Internet with a cable modem, DSL modem, or through a computer network, you are using a Local Area Network.
On the menu bar, go to Tools > Global Options.
Expand Connection.
Click DUN/LAN.
Connect to the Internet using a LAN
Select this option if you connect to the Internet with a Cable modem, DSL modem or through a computer network.
Connect to the Internet using a modem
Select this option if you connect to the Internet using a modem over regular telephone lines.
Use the following Dial-Up Networking connection
Click the dial-up connection you want CuteFTP Pro to use. The list will include every dial-up connection on the local computer that is available in MS Windows®. Many computers will only list one.
Show authentication window (requires user input)
Select this check box to display the dial-up connection user name and password whenever CuteFTP Pro attempts a connection.
Clear this check box to stop the display of the dial-up connection user name and password when CuteFTP Pro attempts a connection.
Show error prompts (requires user interaction)
Select this check box to display messages when an error occurs with the dial-up connection.
Clear this check box to stop the display of error messages from the dial-up connection.
Disconnect from the Internet upon program exit
Select this check box to automatically disconnect from the Internet when CuteFTP Pro and the Transfer Engine shut down.
Clear this check box to keep the Internet connection active after CuteFTP Pro and the Transfer Engine shut down.
Number of times to attempt connection
Choose how many times CuteFTP Pro will try to establish a dial-up connection to the Internet after a connection fails. You can choose from 0 to 1000 attempts.
Number of seconds to wait between attempts
Choose how long in seconds CuteFTP Pro will wait between attempts to establish a dial-up connection to the Internet. You can choose from 0 to 1000 seconds.