What does the HostNameLookups double do?

Question:What does the HostNameLookups double do?

1.Makes Apache perform 2 forward name lookups from different DNS servers to confirm the hostname prior to logging.

2.Performs a hostname lookup in the double-file prior to logging the result.

3.Performs both a reverse name lookup and then a forward name lookup on that result, prior to logging the result.

4.Sets the hostname to double for all hostnames logged.


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