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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at https://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_FTPPORT 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_FTPPORT \- make FTP transfer active
+.SH SYNOPSIS
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTPPORT, char *spec);
+.SH DESCRIPTION
+Pass a pointer to a zero terminated string as parameter. It specifies that the
+FTP transfer will be made actively and the given string will be used to get
+the IP address to use for the FTP PORT instruction.
+
+The PORT instruction tells the remote server to connect to our specified IP
+address. The string may be a plain IP address, a host name, a network
+interface name (under Unix) or just a '-' symbol to let the library use your
+system's default IP address. Default FTP operations are passive, and thus
+won't use PORT.
+
+The address can be followed by a ':' to specify a port, optionally followed by
+a '-' to specify a port range.  If the port specified is 0, the operating
+system will pick a free port.  If a range is provided and all ports in the
+range are not available, libcurl will report CURLE_FTP_PORT_FAILED for the
+handle.  Invalid port/range settings are ignored.  IPv6 addresses followed by
+a port or portrange have to be in brackets.  IPv6 addresses without port/range
+specifier can be in brackets.
+
+Examples with specified ports:
+
+.nf
+  eth0:0
+  192.168.1.2:32000-33000
+  curl.se:32123
+  [::1]:1234-4567
+.fi
+
+You disable PORT again and go back to using the passive version by setting
+this option to NULL.
+
+The application does not have to keep the string around after setting this
+option.
+.SH DEFAULT
+NULL
+.SH PROTOCOLS
+FTP
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/old-server/file.txt");
+  curl_easy_setopt(curl, CURLOPT_FTPPORT, "-");
+  ret = curl_easy_perform(curl);
+  curl_easy_cleanup(curl);
+}
+.fi
+.SH AVAILABILITY
+Port range support was added in 7.19.5
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
+CURLE_OUT_OF_MEMORY if there was insufficient heap space.
+.SH "SEE ALSO"
+.BR CURLOPT_FTP_USE_EPRT "(3), " CURLOPT_FTP_USE_EPSV "(3), "