Defense against ARP spoofing/poisoning

ONLY local attackers can carry on ARP  attacks.

There is no specific and fullproof way to patch or getrid of these attacks but  administrators can atleast prevent it, there are tools available to monitor for ARP poisoning, e.g. ARPwatch , Get it from http://www.icewalkers.com/Linux/Software/528110/arpwatch-NG.html

For Windows , there is a tool called WinARPwatch , get it from  http://www.hacker-soft.net/down.php?id=9980&url=1

Read me file of WinARPwatch
So this program watches the cache and stores every new IP/MAC combination to it’s own lists. If a combination is already known, the program compares it with the cache to see if has changed.If it has changed an icon will start to blink in the sys-tray. Clicking that icon to bring up the program to see what has happened.This program isn’t useful/working for dial-up linkssince PPP doesn’t use ARP, thus isn’t wulnerable to ARP Poisoning.

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