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OSX 10.14 Mojave - man page for curlopt_ftp_skip_pasv_ip (mojave section 3)

CURLOPT_FTP_SKIP_PASV_IP(3)				     curl_easy_setopt options				       CURLOPT_FTP_SKIP_PASV_IP(3)

NAME
CURLOPT_FTP_SKIP_PASV_IP - ignore the IP address in the PASV response
SYNOPSIS
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SKIP_PASV_IP, long skip);
DESCRIPTION
Pass a long. If skip is set to 1, it instructs libcurl to not use the IP address the server suggests in its 227-response to libcurl's PASV command when libcurl connects the data connection. Instead libcurl will re-use the same IP address it already uses for the control connec- tion. But it will use the port number from the 227-response. This option thus allows libcurl to work around broken server installations that due to NATs, firewalls or incompetence report the wrong IP address back. This option has no effect if PORT, EPRT or EPSV is used instead of PASV.
DEFAULT
0
PROTOCOLS
FTP
EXAMPLE
TODO
AVAILABILITY
Added in 7.14.2
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO
CURLOPT_FTPPORT(3), CURLOPT_FTP_USE_EPRT(3), libcurl 7.54.0 February 03, 2016 CURLOPT_FTP_SKIP_PASV_IP(3)