CUTTER(8)
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.
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, targetting 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 sentance in a number of countries
around the world.
The author is not responsible for the results of using this software.
It is provided "as is" in the hope that it will be useful, but no
garantees 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 targetting 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 ipaddress-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 1.03 should be considered EXPERIMENTAL. The author is releasing
a tool that works on the systems 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.lowth.com/cutter/
<http://www.lowth.com/cutter/>
AUTHOR
- Blars Blarson addapted the README and web page written by Chris Lowth
into this man page for debian package of cutter. This man page may be
distribuated under the terms of the Gnu GPL version 2.