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
       reuses the same IP address it already uses for the control connection. It still uses the port number from
       the 227-response.

       This option allows libcurl to work around broken server installations or funny network setups that due to
       NATs,  firewalls  or  incompetence report the wrong IP address. Setting this 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

       This functionality affects ftp only

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           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);
           res = curl_easy_perform(curl);

           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.15.0

RETURN VALUE

       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

       CURLOPT_FTPPORT(3), CURLOPT_FTP_USE_EPRT(3)

libcurl                                            2025-06-16                        CURLOPT_FTP_SKIP_PASV_IP(3)