The maximum DNS (Domain Name Server) setting for TTL (Time to Live) is 86400. TTL settings are entered as seconds and the max TTL time is one day. 60×60x24 = 86400.

For instance, if you want to reduce the cached Ttl to 10 minutes. Use a MaxCacheTtl value of 600. You can also set a different value for the Maximum Negative cache (Cached answers of non-existent domain) set the MaxNegativeCacheTtl to 0, and the DNS Client cache will not cache Negative responses. Although, if you query the same DNS server again, if the non-existent domain may be still in its cache.

All values in these entries are in seconds.

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