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       logresolve - Resolve IP-addresses to hostnames in Apache log files


       logresolve [ -s filename ] [ -c ] < access_log >


       logresolve  is  a  post-processing  program  to resolve IP-addresses in
       Apache's access  logfiles.  To  minimize  impact  on  your  nameserver,
       logresolve  has its very own internal hash-table cache. This means that
       each IP number will only be looked up the first time it is found in the
       log file.

       Takes  an  Apache  log file on standard input. The IP addresses must be
       the first thing on each line and must be separated from  the  remainder
       of the line by a space.


       -s filename
              Specifies a filename to record statistics.

       -c     This  causes  logresolve to apply some DNS checks: after finding
              the hostname from the IP address, it looks up the  IP  addresses
              for  the  hostname  and  checks  that  one  of these matches the
              original address.