if has a tool or command in linux to prevent arp attack????

You can filter arp packets with iptables (and other firewall software) if that's what you mean. You can't prevent Address Resolution Protocol, it's part of the way computers automatically obtain an IP address.

Arp traffic from the "internet at-large," if there even is any, is filtered out by your ISP. Your neighbors on the same subnet all broadcast arp packets when they first turn on their computer and every time their IP# lease expires (in my case hourly). Lots of arp traffic is normal on busy cable subnets. If you're receiving too many arp packets, talk to your ISP and see what they say about it. They have the tools to sniff your connection. And they might say something similar to what I said in a way that makes more sense.

Sorry double-post edited out. I may as well add that arp attack is best performed by a hacker who is already inside your home or company's network, in other words, if you are worried about arp attack, arp attack is the least of your problems. Put up a good firewall and clean your network of viruses, trojans and other malware frequently, especially if it contains windows machines. An infected windows (or linux for that matter) box is just that, a window into your network.

And just because so-called malware removers give you a thumbs-up icon, don't assume they are totally clean. New threats are coming out every day, perhaps every hour. If my reputation was on the line, I wouldn't trust a computer until it had been backed up and re-imaged.

thank for your reply!~