CURLOPT_FTP_SKIP_PASV_IP(3)curl_easy_setopt optionsCURLOPT_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 connection.
But it will use the port number from the 227-response.
This option thus allows libcurl to work around broken server installa-
tions that due to NATs, firewalls or incompetence report the wrong IP
address back. Setting the option also reduces the risk for various
sorts of client abuse by malicious servers.
This option has no effect if PORT, EPRT or EPSV is used instead of
PASV.
DEFAULT
1 since 7.74.0, was 0 before then.
PROTOCOLS
FTP
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
/* please ignore the IP in the PASV response */
curl_easy_setopt(curl, CURLOPT_FTP_SKIP_PASV_IP, 1L);
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
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 7.81.0 November 26, 2021 CURLOPT_FTP_SKIP_PASV_IP(3)
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