CURLOPT_FTP_USE_EPRT - use EPRT for FTP

Added in curl 7.10.5

Pass a long. If the value is 1, it tells curl to use the EPRT command when doing active FTP downloads (which is enabled by CURLOPT_FTPPORT(3)). Using EPRT means that libcurl first attempts to use EPRT before using PORT, but if you pass zero to this option, it avoids using EPRT, only plain PORT. The EPRT command is a slightly newer addition to the FTP protocol than PORT and is the preferred command to use since it enables IPv6 to be used. Old FTP servers might not support it, which is why libcurl has a fallback mechanism. Sometimes that fallback is not enough and then this option might come handy. If the server is an IPv6 host, this option has no effect as EPRT is necessary then.

int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode res; curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt"); /* contact us back, aka "active" FTP */ curl_easy_setopt(curl, CURLOPT_FTPPORT, "-"); /* FTP the way the neanderthals did it */ curl_easy_setopt(curl, CURLOPT_FTP_USE_EPRT, 0L); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } }

CURLOPT_FTP_USE_EPRT - use EPRT for FTP

This functionality affects ftp only

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).

CURLOPT_FTPPORT(3), CURLOPT_FTP_USE_EPSV(3) libcurl 2025-06-16 CURLOPT_FTP_USE_EPRT(3)

#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_USE_EPRT, long enabled);