The FTP-Proxy White Paper: Inbound and Outbound FTP Traffic

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## 5. Inbound and Outbound FTP Traffic

The most common use of FTP-Proxy will probably be "inbound" FTP traffic. This means that clients from an "outside" world seek access to a "local" FTP server. Nevertheless, FTP-Proxy supports also an "outbound" mode, where clients have more control over the FTP connections.

The concept of "outbound" traffic is based on the increased level of trust that users enjoy. When setting the `AllowMagicUser` config option to "yes" and allowing the "@" and ":" characters as part of the USER command argument, users can determine the destination server's address and port with the USER command. All they have to do is to append the host name, separated by the "@" sign, optionally followed by a colon and the port. These compartments will be removed from the name and evaluated as destination.

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