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Let's put it simply, I hope it can help you. The poisoned machine will constantly send ARP spoofing to other computers, so that other computers think it is a gateway, so the Internet is first connected to it, and we will call it the source of poison for the time being. Find out the source of the poison first, and it's best to reinstall it, because I've tried many methods, and even if I can solve it, it's not thorough enough.
Other computers that are not poisoned but are always deceived, you can put on an anti-ARP patch, this search is there, and then install a firewall that can prevent ARP spoofing, such as Fengyun Firewall, if you don't like to use a firewall, you can set up a batch file, let these computers run as soon as they are turned on, the content of the batch file is bound to the IP and MAC address of the gateway, and the command is: arp -s IP address MAC address.
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You type arp -a in the command line to see if all the mac addresses are different and the ip address is not the same, then it's normal, if arp -a sees that there are two mac addresses the same, it is arp spoofing, you can find the host according to the corresponding ip address and use arp -d to delete the existing arp information, and then use arp -s to bind the correspondence between the ip of the local machine and the mac, it is best to reinstall the poisoned machine.
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How to fix ARP virus? Hopefully get an answer that really solves the problem
Bounty Points: 20 - 14 days and 23 hours until the end of the question.
The LAN in our company is now unusable......The reason may be that the router has been infected with an ARP virus. Is there any way to solve it......Change a router?? What kind of router to change?
Antivirus?? What antivirus software to use? Please say some useful solutions, if it is pasted and copied on the Internet, it is better not to bother you to make any more efforts......Thank you for your kindness......
The router cannot be poisoned, it can only be deceived, and the so-called ARP virus refers to the virus that sends a fake ARP return to deceive the computer or switch on the network. So no matter how you change the router, it's useless, first restore the normal use of the network, use the command arp -a column in front of the arp cache table on a computer affected by the arp virus, see which mac addresses are the same, find out it, and then find the corresponding computers, these computers are infected with the arp virus, use the arp firewall tool to ensure that the arp packets sent by it are normal, and then use an antivirus program to check and kill the virus.
Try the antivirus software for yourself, and use whichever works for you.
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