Provided by: cutter_1.04-1_amd64 
NAME
cutter - cut tcp/ip connections
SYNOPSIS
cutter ipaddress1 [ port1 [ ipaddress2 [ port2 ] ] ]
DESCRIPTION
Cutter is an open source program that allows Linux firewall administrators to abort TCP/IP connections
routed over the firewall or router on which it is run. it is not designed to work on the systems hosting
the server or client using the connection, it only works on a linux firewall or router over which the
connection is made, and it must be run by the root user of the firewall.
WARNING
Cutter has been designed for use as a administrators tool for Linux firewalls. It's use (as is, or
modified) for any other purpose is not sanctioned by the author. So - do not use this tool as a
parachute, or to dry your cat, chill meat, answer your phone, drive you car, teach your kids to read or
attack other people's computer systems or networks.
This software has been designed for legal and appropriate use by network security administrators and the
like. It has been written as part of a larger Linux firewall project, targeting at controlling traffic
from peer-to-peer software such as Kazaa, iMesh and others into and out of a private network. It is not
designed as a tool for malicious use and the author in no way sanctions such use.
Users of the software should be aware that it's actions are easily detectable using a number of readily
available network monitoring tools, and it makes no attempt to disguise it's actions. Malicious use of
"cutter" could result in a jail sentence in a number of countries around the world.
The author is not responsible for the results of using this software or documented technique(whether in
it's original form, or modified). It is provided "as is" in the hope that it will be useful, but no
guarantees are made about it's use.
USAGE
Cutter can be called using one of the following four syntaxes.
cutter ip-address
Example:
cutter 10.10.0.45
Cuts all connections passing through the firewall between any ports on the specified ip-address
(either a "private" or "public" address) and any other hosts. This can be used to close down all
incoming connections to a particular server, all outgoing connections from a particular client or
all outgoing connections to a server.
cutter ip-address port
Example:
cutter 200.1.2.3 80
Cuts all connections to or from the specified ip-address/port pair. This allows the user to be a
little more specific than the previous example and allows targeting of specific services on
specific hosts.
cutter ip-address-1 port-1 ip-address-2
Example:
cutter 200.1.2.3 22 10.10.0.45
Cuts all connections between ip-address-2 and ip-address-1/port-1. This allows the user to cut
connections between a specified "client" and a particular service on a specified host. Our example
closes host 10.10.0.45's SSH connection to server 200.1.2.3.
cutter ip-address-1 port-1 ip-address-2 port-2
Example:
cutter 200.1.2.3 22 10.10.0.45 32451
Cuts the specific connection between the two ip/port number pairs given.
STATUS
Cutter 1.04 should be considered EXPERIMENTAL. The author is releasing a tool that works on the systems
which he has access to (namely: IPCop and RedHat Linux), and he is seeking input on it's use on other
systems, ideas for improvement, offers of sponsorship - etc.
ADDITIONAL DOCUMENTATION
This program is documented at: <http://www.digitage.co.uk/digitage/software/linux-security/cutter>
AUTHOR
Blars Blarson adapted the README and web page written by Chris Lowth into this man page for debian
package of cutter. This man page may be distributed under the terms of the Gnu GPL version 2.
August, 2015 CUTTER(8)