Isowall - A mini-firewall that completely isolates a target device from the local network

This is a mini-firewall that completely isolates a target device from the local network. This is for allowing infected machines Internet access, but without endangering the local network.

Building

This project depends upon libpcap, and of course a C compiler.

On Debian, the following should work:

# apt-get install git gcc make libpcap-dev
# git clone https://github.com/robertdavidgraham/isowall
# cd isowall
# make

This will put the binary isowall in the local isowall/bin directory.

This should also work on Windows, Mac OS X, xBSD, and pretty much any operating system that supports libpcap.

Running

First, setup a machine with three network interfaces.

The first network interface (like eth0) will be configured as normal, with a TCP/IP stack, so that you can SSH to it.

The other two network interfaces should have no TCP/IP stack, no IP address, no anything. This is the most important configuration step, and the most common thing you'll get wrong. For example, the DHCP software on the box may be configured to automatically send out DHCP requests on these additional interfaces. You have to go fix that so nothing is bound to these interfaces.

To run, simply type:

# ./bin/isowall --internal eth1 --external eth2 -c xxxx.conf

where xxxx.conf contains your configuration, which is described below.

Configuration

The following shows a typical configuration file.

internal = eth1
internal.target.ip = 10.0.0.129
internal.target.mac = 02:60:8c:37:87:f3

external = eth2
external.router.ip = 10.0.0.1
external.router.mac = 66:55:44:33:22:11

allow = 0.0.0.0/0
block = 192.168.0.0/16
block = 10.0.0.0/8
block = 224.0.0.0-255.255.255.255

The target device we are isolating has the indicated IP and MAC address.

Only IPv4 and ARP packets are passed.

Outbound packets must have the following conditions:

• source MAC address equal to internal.target.mac
• destination MAC address equal to external.router.mac
• EtherType of 0x800 or 0x806
• source IPv4 address equal to internal.target.ip
• destination IPv4 address within an allow range, but not in a block range
• if an ARP packet, then the destination IPv4 address must equal that external.router.ip
• if an ARP packet, must be a "request"

Inbound packets must have the following conditions:

• destination MAC address equal to internal.target.mac
• source MAC address equal to external.router.mac
• EtherType of 0x800 or 0x806
• destination IPv4 address equal to internal.target.ip
• source IPv4 address within an allow range, but not in a block range
• if an ARP packet, then the source IPv4 address must equal that external.router.ip
• if an ARP packet, then must be a "reply"

Download Isowall

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[Nsdtool] Toolset of scripts used to detect netgear switches in local networks

Nsdtool is a toolset of scripts used to detect netgear switches in local networks. The tool contains some extra features like bruteforce and setting a new password.

Netgear has its own protocol called NSDP (Netgear Switch Discovery Protocol), which is implemented to support security tests on the commandline. It is not being bound to the delivered tools by Netgear.

Usage

Define your interface and possible delay in the config.ini.

# cat config.ini
[NSDP]
SourcePort = 63323 <--- nsdp source
DestPort = 63324 <--- nsdp dest
Interface = eth0 <--- your network interface
DestIP = 255.255.255.255
Delay = 0.01 <--- interval delay

Download Nsdtool

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[Zarp v0.1.3] Local Network Attack Tool

Zarp is a network attack tool centered around the exploitation of local networks. This does not include system exploitation, but rather abusing networking protocols and stacks to take over, infiltrate, and knock out. Sessions can be managed to quickly poison and sniff multiple systems at once, dumping sensitive information automatically or to the attacker directly. Various sniffers are included to automatically parse usernames and passwords from various protocols, as well as view HTTP traffic and more. DoS attacks are included to knock out various systems and applications. These tools open up the possibility for very complex attack scenarios on live networks quickly, cleanly, and quietly.

The long-term goal of zarp is to become the master command center of a network; to provide a modular, well-defined framework that provides a powerful overview and in-depth analysis of an entire network. This will come to light with the future inclusion of a web application front-end, which acts as the television screen, whereas the CLI interface will be the remote. This will provide network topology reports, host relationships, and more. zarp aims to be your window into the potential exploitability of a network and its hosts, not an exploitation platform itself; it is the manipulation of relationships and trust felt within local intranets. Look for zeb, the web-app frontend to zarp, sometime in the future. 

Download Zarp v0.1.3

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