What is the format of your datetime value? Take a look at the cpan module Date::Parse. It will enable you to translate the string time into epoch, which is much easier to use to test for ranges.

Observe the following script: 
use Date::Parse qw(str2time);

my $TIME_DELTA = 5 * 60; # In Seconds

# my $mintime = time - $TIME_DELTA;
my $mintime = 1184200080 - $TIME_DELTA; # Harded time of '11/Jul/2007:
+17:28:00'

while (<DATA>) {
    next if ! m{(\d+/\w+/\d+:\d+:\d+:\d+)};
    
    my $errtime = str2time($1);
    next if $errtime < $mintime;
    
    print "$_";
}

__DATA__
192.168.130.2 - - [11/Jul/2007:17:19:05 -0700] 
192.168.174.0 - - [11/Jul/2007:17:19:57 -0700] 
192.168.200.4 - - [11/Jul/2007:17:20:07 -0700] 
192.168.179.60 - - [11/Jul/2007:17:20:10 -0700] 
192.168.174.0 - - [11/Jul/2007:17:20:21 -0700] 
192.168.204.206 - - [11/Jul/2007:17:21:20 -0700] 
192.168.65.202 - - [11/Jul/2007:17:21:20 -0700] 
192.168.32.139 - - [11/Jul/2007:17:21:46 -0700] 
192.168.227.192 - - [11/Jul/2007:17:22:28 -0700] 
192.168.128.135 - - [11/Jul/2007:17:22:43 -0700] 
192.168.104.11 - - [11/Jul/2007:17:23:45 -0700] 
192.168.57.210 - - [11/Jul/2007:17:24:00 -0700] 
192.168.115.28 - - [11/Jul/2007:17:24:55 -0700] 
192.168.112.24 - - [11/Jul/2007:17:25:11 -0700] 
192.168.140.141 - - [11/Jul/2007:17:25:25 -0700] 
192.168.100.206 - - [11/Jul/2007:17:26:31 -0700] 
192.168.140.141 - - [11/Jul/2007:17:26:56 -0700] 
192.168.172.3 - - [11/Jul/2007:17:27:00 -0700] 
192.168.71.179 - - [11/Jul/2007:17:27:43 -0700] 
192.168.81.11 - - [11/Jul/2007:17:27:45 -0700] 
192.168.40.238 - - [11/Jul/2007:17:27:52 -0700] 
192.168.38.255 - - [11/Jul/2007:17:27:53 -0700]

[download]
- Miller

In reply to Re: Using Date::Calc with an error log by wind
in thread Using Date::Calc with an error log by eselement

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