HostNameLookups on If you set the HostNameLookups directive to on then Apache will try to determine (resolve) the hostname corresponding to the client's IP-address when it logs the request. With HostNameLookups set to off, an access_log entry may look like 192.168.200.4 someuser [12/Jun/2005:08:33:34 +0500] "GET /example.png HTTP/1.0" 200 1234 And with HostNameLookups set to on, the same entry would look like unit12.example.com - someuser [12/Jun/2005:08:33:34 +0500] "GET /example.png HTTP/1.0" 200 1234 The next section explains the reverse process, how to replace IP addresses in logs with hostnames. |