org.apache.commons.net.ftp

## Interface FTPClient.HostnameResolver

- All Known Implementing Classes:
    FTPClient.NatServerResolverImpl
  Enclosing class:
    FTPClient

      public static interface FTPClient.HostnameResolver

  Strategy interface for updating host names received from FTP server for passive NAT workaround.
  Since:
    3.6

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `String` | `resolve(String hostname)`

- - ### Method Detail

    - #### resolve

          String resolve(String hostname)
                  throws UnknownHostException

      Throws:
        `UnknownHostException`

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