We have a Cisco 1841 router. we have configured it to act as primary DNS server and also as caching/forwarding DNS server. It is working correctly when queried for domain for which it is authoritative server.
But when we query for other Internet sites like yahoo.com, apache.org etc, first time it resolves correctly (we have configured upstream DNS server as openDNS). But when we query for same sites(which are already in the cache) again we are not getting response.
Please let us know what is the likely problem ?
What is the way to configure a non-caching forward only DNS server ?