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