May 31, 2013 · Networking, Security · Email This Post

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Cutter is an open source program that uses the FIN-ACK-RST packet technique described above 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.

Install cutter in ubuntu

Open the terminal and run the following command

sudo apt-get install cutter

Cutter Syntax

cutter ipaddress1 [ port1 [ ipaddress2 [ port2 ] ] ]

Cutter Examples

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 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.

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