07-06-2012
Remove this servers' IP addresses from resolv.conf, and further, stop and disable the named service on it. After this, your host will use only the master and slave DNS servers and so should always be accurate.
(If for some reason this presents a peformance issue, then we will look at creating a proper dns caching-resolver on this server.)
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LEARN ABOUT MOJAVE
curlopt_dns_cache_timeout
CURLOPT_DNS_CACHE_TIMEOUT(3) curl_easy_setopt options CURLOPT_DNS_CACHE_TIMEOUT(3)
NAME
CURLOPT_DNS_CACHE_TIMEOUT - set life-time for DNS cache entries
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_CACHE_TIMEOUT, long age);
DESCRIPTION
Pass a long, this sets the timeout in seconds. Name resolves will be kept in memory and used for this number of seconds. Set to zero to
completely disable caching, or set to -1 to make the cached entries remain forever. By default, libcurl caches this info for 60 seconds.
The name resolve functions of various libc implementations don't re-read name server information unless explicitly told so (for example, by
calling res_init(3)). This may cause libcurl to keep using the older server even if DHCP has updated the server info, and this may look
like a DNS cache issue to the casual libcurl-app user.
Note that DNS entries have a "TTL" property but libcurl doesn't use that. This DNS cache timeout is entirely speculative that a name will
resolve to the same address for a certain small amount of time into the future.
DEFAULT
60
PROTOCOLS
All
EXAMPLE
TODO
AVAILABILITY
Always
RETURN VALUE
Returns CURLE_OK
SEE ALSO
CURLOPT_DNS_USE_GLOBAL_CACHE(3), CURLOPT_DNS_SERVERS(3),
libcurl 7.54.0 February 03, 2016 CURLOPT_DNS_CACHE_TIMEOUT(3)