04-27-2017
Hi, I have list of IP's ~3k, which are from very small to large subnets. So, I want the IPs to be grouped into subnets that makes sense. The scenario is several groups get IP's based on availability and none of the group should not touch or scan the other IP's. We get the list of IPs based on manual inventory from each group and the key to this part is the provider doesn't manage which set of IPs belong to which group.
So the task is I collected manually all the IPs (which are around 3K) and want to make them into subnets to the nearest class. For example if I have a single IP address it should round off to /32 or if it has 4 ip's it should round off to /29 or /30. I have CIDR tools to do this task, but it needs manual input each time.
I'm looking for a way if I put the 3K ip's into excel or any format the script should round off to nearest subnet class.
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LEARN ABOUT DEBIAN
ip2host
IP2HOST(1) User Contributed Perl Documentation IP2HOST(1)
NAME
ip2host - Resolves IPs to hostnames in web server logs
SYNOPSIS
ip2host [OPTIONS] [cache_file] < infile > outfile
infile - Web server log file.
outfile - Same as input file, but with IPs resolved to hostnames.
Options:
--children=... Number of child processes to spawn (default: 40)
--timeout=... Seconds to wait on DNS response (default: 20)
--buffer=... Maximum number of log lines to keep in
memory (default: 50000)
--flush=... Number of lines to process before flushing
output buffer (default: 500)
--cache=... Filename to use as disk cache (default: none)
--ttl=... Number of seconds before IPs cached on disk are expired
(default: 604800 - One week)
DESCRIPTION
This is a faster, drop-in replacement for the logresolve utility distributed with the Apache web server.
It's been reported to work under Linux, FreeBSD, Solaris, Tru64, and IRIX.
AUTHOR
Maurice Aubrey <maurice.aubrey+ip2host@gmail.com>
Based on the logresolve.pl script by Rob Hartill.
COPYRIGHT
Copyright 1999-2007, Maurice Aubrey <maurice.aubrey+ip2host@gmail.com>.
This module is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
README
Resolves IPs to hostnames in web server logs. This is a faster, drop-in replacement for the logresolve utility distributed with the Apache
web server.
SCRIPT CATEGORIES
Web
perl v5.14.2 2012-02-15 IP2HOST(1)