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CURLOPT_DNS_SERVERS(3)	   Library Functions Manual	CURLOPT_DNS_SERVERS(3)

NAME
       CURLOPT_DNS_SERVERS - DNS servers to use

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_DNS_SERVERS, char *servers);

DESCRIPTION
       Pass  a char pointer that is the	list of	DNS servers to be used instead
       of the system default. The format of the	dns servers option is:

       host[:port][,host[:port]]...

       For example:

       192.168.1.100,192.168.1.101,3.4.5.6

       The application does not	have to	keep the string	around	after  setting
       this option.

       Using this option multiple times	makes the last set string override the
       previous	ones. Set it to	NULL to	disable	its use	again.

DEFAULT
       NULL

PROTOCOLS
       This functionality affects all supported	protocols

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
	   curl_easy_setopt(curl, CURLOPT_DNS_SERVERS,
			    "192.168.1.100:53,192.168.1.101");
	   res = curl_easy_perform(curl);
	   curl_easy_cleanup(curl);
	 }
       }

NOTES
       This  option  requires  that  libcurl was built with a resolver backend
       that supports this operation. The c-ares	backend	is the only such one.

AVAILABILITY
       Added in	curl 7.24.0

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_DNS_CACHE_TIMEOUT(3), CURLOPT_DNS_LOCAL_IP4(3), CURLOPT_DNS_LO-
       CAL_IP6(3)

libcurl				  2025-06-03		CURLOPT_DNS_SERVERS(3)

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