logresolve - Resolve IP-addresses to hostnames in Apache log files
logresolve [ -s filename ] [ -c ] <
access_log > access_log.new
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.
- 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.