10-16-2017
Actually I am ok with bakunin's proposal.
Just that it still doesn't work. The line just freezes there an does not proceed to the next iteration? I have been waiting for the code to execute as when it is possible.
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LEARN ABOUT DEBIAN
grepcidr
GREPCIDR(1) General Commands Manual GREPCIDR(1)
NAME
grepcidr -- Filter IP addresses matching IPv4 CIDR/network specification
SYNOPSIS
grepcidr [-V] [-c] [-v] [-e pattern | -f file]
DESCRIPTION
This manual page documents briefly the grepcidr command.
This manual page was written for the Debian distribution because the original program does not have a manual page.
grepcidr can be used to filter a list of IP addresses against one or more Classless Inter-Domain Routing (CIDR) specifications, or arbi-
trary networks specified by an address range. As with grep, there are options to invert matching and load patterns from a file. grepcidr
is capable of comparing thousands or even millions of IPs to networks with little memory usage and in reasonable computation time.
OPTIONS
-V Show software version
-c Display count of the matching lines, instead of showing the lines
-v Invert the sense of matching, to select non-matching IP addresses
-e Specify pattern(s) on command-line
-f Obtain CIDR and range pattern(s) from file
EXAMPLES
grepcidr -f ournetworks blocklist > abuse.log
Find our customers that show up in blocklists
grepcidr 127.0.0.0/8 iplog
Searches for any localnet IP addresses inside the iplog file
grepcidr "192.168.0.1-192.168.10.13" iplog
Searches for IPs matching indicated range in the iplog file
script | grepcidr -vf whitelist > blacklist
Create a blacklist, with whitelisted networks removed (inverse)
grepcidr -f list1 list2
Cross-reference two lists, outputs IPs common to both lists
AUTHOR
This manual page was written by Ryan Finnie ryan@finnie.org for the Debian system (but may be used by others). Permission is granted to
copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by
the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.
GREPCIDR(1)