When we talk in the context of the security of network then spoofing is one malicious act in which one program or a person falsify the data and send it to the local network area thus successfully faking him. ARP guards are present to save you from falling into this kind of treachery. This guard comes with an early warning guard system and sends out the necessary alerts as soon as anything undesirable is detected but it needs to be check on daily basis to ensure an effective result. An ARP guard however only manages to alert you against an attack but is incapable of stopping it completely.
Detection of ARP spoofing attack
Many times ARP attacks simply go unnoticed but detecting them is not such a difficult task. This is especially easy when the malware is successful in giving an appropriate response whenever it receives a standard ARP request.
Using wireshark or tcpdmp to start a network capture is one possible way to detect any such mischief. You need end the capture after generating traffic on your PC. Then scrutinize the traffic and make sure that you are receiving ARP responses from one address only. If it isn’t so this means that you are not the only one accessible to all your vital information.
How an ARP attack occurs
An ARP attack usually takes place when the attacker associates the MAC address of his machine with IP address of someone else’s. This means that any traffic that is meant for that IP address will now be delivered to the attacker instead. The attacker now has an access to all your necessary information and can keep a check on all the communication sent and received by you assuming you were the victim. If the attacker has successfully managed to interfere with the MAC address of the machine, he can also now alter any connection to the internet. The attacker can also use another person for a middle attack by inputting his machine between the two machines. This will give rise to all sorts of malignant attacks.
How to stop ARP spoofing?
It is very necessary to stop these attacks before all your information goes into wrong hands. A very advisable and recommended source for this is arpON which is portable handler capable of inspecting and preventing the ARP attacks. Two other effective ways to prevent arp poisoning are SARPI and DARPI based. These two are synonyms for Static Arp Inspection and Dynamic ARP Inspection respectively.
One thing that should be taken care of is that mostly the softwares are only successful in producing an appropriate alert to the spoofing attack but when it comes to removing them, they fail. So the tools should be selected with great consideration.