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## 7. User Authentication

Since proxy-suite Version 1.9 the ftp-proxy supports user authentication. To enable it, the `UserAuthType` configuration option have to be set to the name of the mechanism used, i.e. ldap (currently the only one).

For more information on LDAP based authentication, see also the Using an LDAP Directory section.

Per default, the normal "ftpuser" and "ftppass" from USER and PASS FTP commands are used for the authentication. This may be usefull especially in "inbound" mode of the proxy.

In "outbound" mode, it may be usefull to use an extended enconding of an "authuser" and "authpass" additionally to the normal "ftpuser" and "ftppass" using the `UserAuthMagic` option supported by some FTP clients, i.e. "@auth" for NcFTP, type 5.

The `UserAuthMagic` configuration variable can be set to either auth@ or @auth, where "@" is an encoding separator character and can also be set to an different one, i.e. to ":", using auth: or :auth.

If the "auth" keyword is prepended by the separator character, the USER command will be parsed as "ftpuser@authuser" or in combination with the `AllowMagicUser` as "ftpuser@authuser@host:port" and the PASS FTP command as "ftppass@authpass".

If the "auth" keyword is followed by the separator character, the parsing is done in the different order as "authuser@ftpuser".

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