ARP poisoning attack

Posted on 2007-04-11
Last Modified: 2012-06-27
i want a tool to prevent ARP poisoning attack in windows XP. i tried to but a static ARP entry but it does not prevent it.
Question by:AmChamEgypt
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LVL 29

Expert Comment

by:Alan Huseyin Kayahan
ID: 18889731
             Hi AmChamEgypt
                 ARP Poisoning is not preventable by a clientside tool. You need a switch that supports security features.


Expert Comment

ID: 18894929
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Expert Comment

ID: 18894931
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Author Comment

ID: 18917762
the satiation is that someone in my network uses a program called "netcut" that can poisoning my ARP table with a fake MAC address to the gateway so it cut me off accessing the internet. i tried to use static ARP entry to my gateway. but it does not work. the last thing i tried an application called Xarp that monitor the ARP table updates and prevent some illegal updates. it made some improvement but it does not totally solve the problem. i do not know, is it unsolvable problem?!!!  can you experts send any ideas?
LVL 17

Expert Comment

ID: 18917890
What are the names and models of your switch's

Author Comment

ID: 18923048
it is d-link switched. it is not intelligent. i need a client side solution. i need a tool that monitor the ARP protocol and drop any illegal packets. is there any tool that can do that??

Accepted Solution

infotactix earned 500 total points
ID: 18934043
The static ARP entry needs to be on the gateway, not on the XP client. The problem here is not that your machine doesn't know how to get to the gateway, but that your packets from the gateway (and any other hosts that are receiving gratuitous ARP packets for resolving your IP) are being redirected to another host.

ARP poisoning attacks can be defended against by using a switch that supports port security.

Setting static ARP entries on all (or at least critical) hosts will help, but is probably not practical in anything beyond a small network. This is not effective on all operating systems, since Windows will accept dynamic ARP updates even if you set static entries.

For Linux and similar OSes, there is arpwatch to monitor unusual ARP traffic, but I don't think there is anything like it for Windows. Even so, arpwatch doesn't defend against ARP attacks, it just lets you know about it.


Expert Comment

ID: 18934134
Update: XARP is a free Windows tool that is similar to arpwatch. It works by watching your local ARP cache for changes. Again, this won't stop the attack, it'll just let you know about it. If you want to try it, be aware that you'll need to install MFC70.dll to support it on XP.

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