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arp-attacks in our hostel

Happy New Year 2 everyone in this world!
Let al your dreams come true in this 0x7DA year!!!

Right after the NY celebration I wanted to crawl the web & get in touch with my friends. I was really disappointed when I saw our local gateway down…No ping queries were successful:(
I put ping -t and returned to celebration!
At 02 AM ping succeeded!
The situation repeated several times…

But I really wanted to wish best wishes to my mates!
So I started to investigate… The computer was overfilled with ARP-queries :( They changed the real MAC-address of the gateway, so the computer sent packets into wrong place.

The solution is simple:

Make your ARP table entries static!
Under Windows You can do it in the following way:

  1. Run “cmd”; [Start->Run->type “cmd” into it]
  2. type in command line:
    arp -s Gateway.Or.Another.Computer It-s-MAC-Address
  3. For instance if computer’s ip is;
  4. It’s MAC-address is 00-11-22-33-44-55;
  5. So you should type into command-line:
    arp -s 00-11-22-33-44-55

Best Wishes!!!

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