How to connect to FTP server which requires SSL authentication?
Hello,
I tried searching through lot of threads for a solution but couldn't fetch the exact solution, so I am creating a new thread.
I am trying to connect to a FTP server
1) using a simple FTP command, it gives the error :
2) using SFTP command on port number 21
3) using curl command, it throws following error
I am stuck at this point and could not think of any solution. Let me know if I am missing out on anything here.
Thanks in advance & apologies if a similar thread already exist.
Regards,
Amit
Last edited by Scott; 11-09-2011 at 02:35 PM..
Reason: Code tags...
I have the following ftp script to get files from a remote location.
However, on running the script I find that I am not even able to connect to ftp server.
I am able to connect to ftp server using other GUI ftp tools like WS_FTP using the same IP.
IP used here is a dummy IP.
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Discussion started by: trifo75
1 Replies
LEARN ABOUT MOJAVE
curlopt_use_ssl
CURLOPT_USE_SSL(3) curl_easy_setopt options CURLOPT_USE_SSL(3)NAME
CURLOPT_USE_SSL - request using SSL / TLS for the transfer
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USE_SSL, long level);
DESCRIPTION
Pass a long using one of the values from below, to make libcurl use your desired level of SSL for the transfer.
These are all protocols that start out plain text and get "upgraded" to SSL using the STARTTLS command.
This is for enabling SSL/TLS when you use FTP, SMTP, POP3, IMAP etc.
CURLUSESSL_NONE
Don't attempt to use SSL.
CURLUSESSL_TRY
Try using SSL, proceed as normal otherwise.
CURLUSESSL_CONTROL
Require SSL for the control connection or fail with CURLE_USE_SSL_FAILED.
CURLUSESSL_ALL
Require SSL for all communication or fail with CURLE_USE_SSL_FAILED.
DEFAULT
CURLUSESSL_NONE
PROTOCOLS
FTP, SMTP, POP3, IMAP
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/file.ext");
/* require use of SSL for this, or fail */
curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
/* Perform the request */
curl_easy_perform(curl);
}
AVAILABILITY
Added in 7.11.0. This option was known as CURLOPT_FTP_SSL up to 7.16.4, and the constants were known as CURLFTPSSL_*
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
SEE ALSO CURLOPT_SSLVERSION(3), CURLOPT_SSL_OPTIONS(3),
libcurl 7.54.0 February 03, 2016 CURLOPT_USE_SSL(3)