You can sort them using the Socket module and a GRT: 
use Socket;

print
    map substr( $_, 4 ),
    sort
    map {
        my ( $src ) = /src\D+([\d.]+)/;
        my $ip = inet_aton( $src ) || "\0\0\0\0";
        "$ip$_";
        }
    @syslog;

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In reply to Re: Sorting log files with IP addresses (duplicates) by jwkrahn
in thread Sorting log files with IP addresses (duplicates) by Secode

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