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If you run an FTP server, you should not let it be accessible for the Internet directly. You should hide the server behind a proxy, which receives the inquiries and gets the adequate files from the internal FTP server. The following settings are necessary if you want to make an internal FTP server accessible over the FTP proxy of Gibraltar:
Destination address: Enter the IP address of the internal FTP server, whereto incoming inquiries should be redirected. Destination port: Enter the port, on which the internal FTP server should listen for incoming inquiries. Normally it's port 21.
TIP: Do not forget to set a packet filter rule for the port 21 from the external network interface to LOCAL to ACCEPT.
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