CURLOPT_KRBLEVEL(3) Library Functions Manual CURLOPT_KRBLEVEL(3)
NAME
CURLOPT_KRBLEVEL - FTP kerberos security level
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KRBLEVEL, char *level);
DESCRIPTION
Deprecated. It serves no purpose anymore.
Pass a char pointer as parameter. Set the kerberos security level for
FTP; this also enables kerberos awareness. This is a string that should
match one of the following: clear, safe, confidential or private. If
the string is set but does not match one of these, private is used. Set
the string to NULL to disable kerberos support for FTP.
The application does not have to keep the string around after setting
this option.
The application does not have to keep the string around after setting
this option.
DEFAULT
NULL
PROTOCOLS
This functionality affects ftp only
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode result;
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_KRBLEVEL, "private");
result = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
HISTORY
Functionality removed in 8.17.0
This option was known as CURLOPT_KRB4LEVEL up to 7.16.3
DEPRECATED
Deprecated since 8.17.0
AVAILABILITY
Added in curl 7.16.4
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_USE_SSL(3)
libcurl 2026-03-23 CURLOPT_KRBLEVEL(3)
curl 8.19.0 - Generated Fri Mar 27 15:19:34 CDT 2026