Digisol DG-BG4300NU User Manual page 108

4.6.2.7 FTP ALG Port
Click FTP ALG Port in the left pane, the page shown in the following figure appears. The
common port for FTP connection is port 21, and a common ALG monitors the TCP port 21 to
ensure NAT pass-through of FTP. By enabling this function, when the FTP server connection
port is not a port 21, the FTP ALG module will be informed to monitor other TCP ports to
ensure NAT pass-through of FTP.
The following table describes the parameters and buttons of this page:
Field
FTP ALG port
Add Dest Ports
Delete Selected DestPort
Description
Set an FTP ALG port.
Add a port configuration.
Delete a selected port configuration from the list.
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DG-BG4300NU User Manual