User Manual of FRT-415N
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5.4.2.6 FTP ALG Port
FTP uses two communication channels, one for control commands and one for the actual files being transferred.
When an FTP session is opened, the FTP client establishes a TCP connection (the control channel) to (usually)
port 21 on the FTP server. What happens after this point depends on the mode of FTP being used.
Figure 5-42
FTP ALG Port
The following table describes the parameters:
Field
Description
FTP ALG port
Set an FTP ALG port.
Add Dest Ports
Add a port configuration.
Delete Selected Dest
Port
Delete a selected port configuration from the list.
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