This is possible using three kinds of anti ARP Poisoning techniques: the first is based on SARPI or “Static ARP Inspection” in statically configured networks without DHCP; the second on DARPI or “Dynamic ARP Inspection” in dynamically configured networks having DHCP; the third on HARPI or “Hybrid ARP Inspection” in “hybrid” networks, that is in statically and dynamically (DHCP) configured networks together.

SARPI, DARPI and HARPI protects both unidirectional, bidirectional and distributed attacks: into “Unidirectional protection” is required that ArpON is installed and running on one node of the connection attacked; into “Bidirectional protection” is required that ArpON is installed and running on two nodes of the connection attacked; into “Distributed protection” is required that ArpON is installed and running on all nodes of the connections attacked. All other nodes without ArpON will not be protected from attack.

ArpON is therefore a host-based solution that doesn’t modify ARP’s standard base protocol, but rather sets precise policies by using SARPI for static networks, DARPI for dynamic networks and HARPI for hybrid networks thus making today’s standardized protocol working and secure from any foreign intrusion.

Features

• It detects and blocks Man In The Middle through ARP Spoofing/Poisoning attacks in statically, dynamically (DHCP), hybrid configured networks
• It detects and blocks derived attacks: DHCP Spoofing, DNS Spoofing WEB Spoofing, Session Hijacking, SSL/TLS Hijacking & co
• It detects and blocks unidirectional, bidirectional and distributed attacks
• Doesn’t affect the communication efficiency of ARP protocol
• Doesn’t affect the race response time from attacks
• Multi-threading on all OS supported
• It manages the network interface into unplug, boot, hibernation and suspension OS features
• It works in userspace for OS portability reasons
• Easily configurable via command line switches, provided that you have root permissions
• Tested against Ettercap, Cain & Abel, dsniff and other tools

You can download ArpON v2.2 here:

ArpON-2.2.tar.gz

Or read more here.

Cain & Abel is a password recovery tool for Microsoft Operating Systems. It allows easy recovery of various kind of passwords by sniffing the network, cracking encrypted passwords using Dictionary, Brute-Force and Cryptanalysis attacks, recording VoIP conversations, decoding scrambled passwords, recovering wireless network keys, revealing password boxes, uncovering cached passwords and analyzing routing protocols. The program does not exploit any software vulnerabilities or bugs that could not be fixed with little effort. It covers some security aspects/weakness present in protocol’s standards, authentication methods and caching mechanisms; its main purpose is the simplified recovery of passwords and credentials from various sources, however it also ships some “non standard” utilities for Microsoft Windows users.

Cain & Abel has been developed in the hope that it will be useful for network administrators, teachers, security consultants/professionals, forensic staff, security software vendors, professional penetration tester and everyone else that plans to use it for ethical reasons. The author will not help or support any illegal activity done with this program. Be warned that there is the possibility that you will cause damages and/or loss of data using this software and that in no events shall the author be liable for such damages or loss of data. Please carefully read the License Agreement included in the program before using it.

The latest version is faster and contains a lot of new features like APR (Arp Poison Routing) which enables sniffing on switched LANs and Man-in-the-Middle attacks. The sniffer in this version can also analyze encrypted protocols such as SSH-1 and HTTPS, and contains filters to capture credentials from a wide range of authentication mechanisms. The new version also ships routing protocols authentication monitors and routes extractors, dictionary and brute-force crackers for all common hashing algorithms and for several specific authentications, password/hash calculators, cryptanalysis attacks, password decoders and some not so common utilities related to network and system security.

Most recently added is the support for Windows 2008 Terminal Server in APR-RDP sniffer filter.

You can download Cain & Abel v4.9.35 here:

ca_setup.exe

Or read more here, the online user manual is here.

If you are paranoid about people ARP spoofing or flooding on your network you can use ARPWatch-NG, ARPWatch-NG is a continue of the popular original ARPWatch from ftp://ftp.ee.lbl.gov/.

ARPWatch monitors MAC adresses on your network and writes them into a file, last know timestamp and change notification is included.

It can be used it to monitor for unknown (and as such, likely to be intruder’s) mac adresses or somebody messing around with your ARP/DNS tables.

There have been quite a few fixes lately, so it’s recommended of course to get the latest version!

arpwatch NG 1.5:

try to report error on startup better _ arp.dat _ ethercodes.dat [FIXED]

arpwatch NG 1.4:

try to report _all anomalities via the report function _not syslog [FIXED]

mode 2 _ make action list parseable [FIXED]

further static’fy local functions in arpwatch.c [FIXED]

ethercodes updated from nmap-4.11 and removed old ones [UPDATED]

arpwatch NG 1.2:

on make install also install man-pages [FIXED]

ethercodes updated from nmap-4.00 [UPDATED]

You can download the latest version of ARPWatch here.

Introduction

kArp is a linux patch that allows one to implement ARP hijacking in the kernel, but control it easily via userland. You may configure, enable and disable kArp via ProcFS or the sysctl mechanism.

kArp is implemented almost on the device driver level. Any ethernet driver (including 802.11 drivers) is supported. The kArp code is lower than the actual ARP code in the network stack, and thus will respond to ARP requests faster than a normal machine running a normal network stack, even if the machine we’re spoofing has a CPU twice as fast as ours!

Functionality

• ARP Hijacking - Enabling ARP spoofing allows a user to spoof an ARP response to a specific victim host. Due to the low level at which the code exists, our spoofed packet is guaranteed to arrive at the victim’s network stack prior to the response of the machine we’ve impersonated.
• ARP Hijacking the Impersonated – Enabling this function via arp_send_to_spoofed allows us to spoof the victim’s information to the impersonated machine as well, helping to solidify the MiM attack. However, this functionality may kill the speed of our spoofed frame to the victim, so it isn’t enabled by default.
• ARP Flooding – Enabling this function via arp_flood causes the kernel to send a flood of random source and destination MAC addresses via a broken ARP frame. On some switches this will fill its internal MAC table, or overflow it. Often, the result of this attack is forcing the switch to fall back to dumb hub mode, allowing us to sniff the wire without a MiM attack.

Warning

kArp was written to beat the race in responding to an ARP Request from a target (victim) machine. It is *not* meant as an tool to flood a victim with ARP information. This means that some operating systems (MacOSX) that ingest unsolicited ARP responses may still obtain the actual MAC address of the machine we’re impersonating. Linux, however, only accepts the fastest response. If you want to flood a machine with fake ARP responses, use a userland tool.

For now, the URL is:

http://aversion.net/~north/karp/