Specifications

Figure 3.25: Configuration of the FTP Server
FTP proxy port Port on which the FTP proxy is addressed, normally port
21. Viewed from the outside, this turns your firewall into the FTP
server. Ask your provider to make an alias entry in the DNS for your
firewall, for example, ftp.mycompany.com
Maximum Clients Maximum number of FTP clients that can be connected
to the FTP server at any one time.
Port reset PASV By default, this check box is activated so passive FTP mode
is selected. In passive mode, the FTP client asks the server which ports
to use. The client then opens this port for data transfer. If you deac-
tivate the check box, data transfer takes place in active mode, which
means the client sends a request to the FTP server, which then opens a
port for data transfer to the client.
Same address The check box is activated by default. In this case, the IP ad-
dress to which a request is sent must match the address from which a
reply comes.
64 Using the FAS