1--- 2c: Copyright (C) Daniel Stenberg, <daniel.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLOPT_FTP_SKIP_PASV_IP 5Section: 3 6Source: libcurl 7See-also: 8 - CURLOPT_FTPPORT (3) 9 - CURLOPT_FTP_USE_EPRT (3) 10--- 11 12# NAME 13 14CURLOPT_FTP_SKIP_PASV_IP - ignore the IP address in the PASV response 15 16# SYNOPSIS 17 18~~~c 19#include <curl/curl.h> 20 21CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_SKIP_PASV_IP, long skip); 22~~~ 23 24# DESCRIPTION 25 26Pass a long. If *skip* is set to 1, it instructs libcurl to not use the IP 27address the server suggests in its 227-response to libcurl's PASV command when 28libcurl connects the data connection. Instead libcurl reuses the same IP 29address it already uses for the control connection. It still uses the port 30number from the 227-response. 31 32This option allows libcurl to work around broken server installations or funny 33network setups that due to NATs, firewalls or incompetence report the wrong IP 34address. Setting this option also reduces the risk for various sorts of client 35abuse by malicious servers. 36 37This option has no effect if PORT, EPRT or EPSV is used instead of PASV. 38 39# DEFAULT 40 411 since 7.74.0, was 0 before then. 42 43# PROTOCOLS 44 45FTP 46 47# EXAMPLE 48 49~~~c 50int main(void) 51{ 52 CURL *curl = curl_easy_init(); 53 if(curl) { 54 CURLcode res; 55 curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt"); 56 57 /* please ignore the IP in the PASV response */ 58 curl_easy_setopt(curl, CURLOPT_FTP_SKIP_PASV_IP, 1L); 59 res = curl_easy_perform(curl); 60 61 curl_easy_cleanup(curl); 62 } 63} 64~~~ 65 66# AVAILABILITY 67 68Added in 7.14.2 69 70# RETURN VALUE 71 72Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. 73