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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 result;
	 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");
	 result = 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 			   2026-06-11		  CURLOPT_DNS_SERVERS(3)

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