Home > Computer > Kill or Disrupt Annoying Internet Connection Hogger in Your Network with netCut

Kill or Disrupt Annoying Internet Connection Hogger in Your Network with netCut

Posted By Raymond In Category: Computer

Aug
6
2009
Donate

I believe a lot of us gone through the college life where we had to share Internet connection to cut down the expenditure in paying bills. Sharing the Internet is very easy as long as you have a router. I went through that many years ago when I was renting a room and shared the Internet with a few housemates. Most of them were an OK user because they only surf the web and play local computer games. But there’s one person, a college IT lecturer always leaves his computer turned on and download lots of stuff using LimeWire. That totally slows down my Internet connection and I find it very hard to access some websites. After telling him nicely not to do that or at least configure his P2P application not to download and upload so aggressively, he still hogs the Internet connection.

That time there was a Denial of Service for Windows XP which can reboot the computer or cause a blue screen of death by simply entering the IP address and clicking a button. I had to use that to make his computer unresponsive so that me and other housemates could use the Internet. Of course he didn’t knew about it and thought that it was his computer’s hardware problem. No doubt that it is unethical but sometimes we’re forced to do that when we’re faced with another person who is inconsiderate after telling him nicely not to do that. Don’t ask me for the XP nuker because it no longer works after XP SP1 and obviously doesn’t work with Vista and Windows 7. Recently I discovered another tool which can actually cut the connection of a computer in LAN.


I was watching a hacking video tutorial at milw0rm and found a tool called NetCut. It is a very old tool and most probably some of you might have heard about it. Basically NetCut is a tool that helps you admin your network by purely on ARP protocol. It can list IP-MAC table in seconds, turn on and off network on any computer on your LAN including any device like router and switch. Also, NetCut can protect user from ARP SPOOF attack.

netcut

I have a total of 3 computers at home and I turned them all on. Then I launched NetCut, within seconds it was able to find and list all 3 computers plus router in the program. I selected one of my computer running XP and click the “Cut Off” button. Amazingly the other computer that has been cut off couldn’t access any websites or even a shared folder on a computer in LAN. Tested on Vista and got the same results. I can’t even know what happened to the computer if someone was cutting me off using NetCut. I’d suspect that something was wrong with my network card since I couldn’t even access a shared folder in a LAN.

I am just merely sharing with you that there is something out there thats capable of disrupting your Internet connection without you knowing it. I am NOT encouraging you to go cutting off everyone’s line because you can be caught for using NetCut and probably lose friends or your job. The latest version of netCut is 2.0.8 and you cannot find the download link at the official website arcai.com. It is dangerous to download netCut from other sources because they might have been tampered with trojans or virus.

If you think you’ve been netcuted, I am going to show you how to protect your computer against NetCut on my next article.


Related posts:
  • Repair XP and Vista Internet Connection Problems with ICR
  • How To Share Internet Connection in XP Without Wireless Router
  • Detect Packet Errors in Your Network LAN Connection Status
  • Restore Internet Connection by Repairing Winsock and TCP
  • Stop BitTorrent from Killing Your Internet Connection
    • Zak

      No download link for the tool?

    • http://www.raymond.cc/ Raymond

      Sorry I can’t provide links to such tools. A simple google search can help you find it.

      By the way, the tool that I used to nuke Windows XP is called SMBDie ;)

    • Eao

      It works on xp and vista but what about macs or linuxes?

    • thebetaguy

      The Site “Arcai.com” requires an username and a password!

      What to do ?

    • http://www.raymond.cc/ Raymond

      Read the article carefully. I mentioned very clearly “The latest version of netCut is 2.0.8 and you cannot find the download link at the official website arcai.com.”

    • http://www.mithun.50webs.org/ Mithun John Jacob
    • http://www.raymond.cc/ Raymond

      I will talk about anti netcut tomorrow.

    • fluxtendu

      at least could you give us a sha-1 hash?

    • Avinash

      I guess we can disable this tool by using AntiNet Cut…It can protects you from arp poisoning while working on shared computer networks…You can Know who is cutting your connection…So No internet disconnection any more…

    • Ahinigami

      Try going to software.informer.com and search it. You can also update all your program easily or just download it manually from the main site.

    • zyberakuma

      i found the download site for NetCut 2.0.8.

      pls. see the screenshot below if we have the same exact site Raymond.

      Thanks.

      http://i30.tinypic.com/2qvvbk1.jpg

      Note:

      i blocked some infos that can distunguish the site.

    • http://www.raymond.cc/ Raymond

      This is the netcut’s installer SHA-1 and MD5.

      SHA-1: 742445A7EC52EFC22632BB2D1D87F69D1E27E16B
      MD5: 87CD44764ADE079E9F9C16A2366BBD29

    • thaytsu

      “Review
      NetCut is a program that demonstrates the exploits of the “ARP” protocol. ARP exploits can allow any user on the same local network to pretend to be the network’s gateway instead of your router, which will enable a hacker to interrupt your Internet connection or spy on all the data packets being transferred from and to your computer. …. ” from that website

    • fluxtendu

      thx for the sha-1/md5!

    • Hrishi

      @Ahinigami
      Kaspersky detects a riskware when i download from software.informer.com
      Is this a false positive

    • Gatau

      Ha ha…, NetCut
      i always use this tool.
      In the school, free hotspot in a supermarket and everywhere, if i can connect my laptop.
      NetCut is very usefull.
      You can connect to a LAN Network, and if you want only you can connect to internet through LAN Network use this tool!
      Some antivirus detect this software as a malware, but its up to you.
      This software is clean (in my opinion) so try this software.
      Not everybody know about this tool. They don’t know if their PC is not connected in Network cause this software, and don’t know to resolve that problem.
      If you are sacrifice cause this tool, use Anti-NetCut.search it on google!.

    • Ankur

      I am facing a similar problem.I use internet through LAN. It really crawls when many users of my locality download simultaneously.

    • Foxy

      Seems it won’t install on Win7 RC. WinPcap error.

    • webcadre

      nice one ray! :)

    • Luke

      Thanks for the hash sums.

      lnw

    • http://www.raymond.cc/blog/archives/2009/08/06/kill-or-disrupt-annoying-internet-connection-hogger-in-your-network-with-netcut/ DEYVID

      es sobre este articulo….
      no se si me podrias ayudar lo que pasa es que tengo un internet con 6 maquinas y me pasa casi lo mismo estan trabajando las 6 maquinas y hay un cliente que se baja musica o pvideos o peliculas.. esto hace que las demas computadoras pierdan su velocidad de internet. como puedo hacer para que cada computadora tenga la misma velocidad sin perderla ni que otro consuma mas. por favor me podrias ayudar.. de antemano muchas gracias…..

    • http://www.raymond.cc/blog/archives/2009/08/06/kill-or-disrupt-annoying-internet-connection-hogger-in-your-network-with-netcut/ DEYVID

      me olvide con el ares y ese programa es super pesadoooooooo y gracias por tu tiempo..

    • skywalker

      Im having problems with the program in VISTA + WLAN. When i run it, it cant detect adapters, I even installed the latest WinPcap version. I think this will only run in WIRED LAN connections. I dont have extra wires so i cant test it in a wired lan.

      Its funny because a commenter said he used it in free hotspots. :-)

    • chris

      Ya, it works like a charm.
      thanks for sharing ray!
      oh and its not hard to find the 2.08 download. just need to know what to feed google with.

    • trent

      Thanxs,
      downloaded, md5 and sha-1 matche but propertie version shows 2.06… weird.

    • wang4wei4

      Is it still run if there is a layer-3 switch in a LAN ?

    • Al

      Raymond is this the same as the one i ran through threatexpert

      http://www.threatexpert.com/report.aspx?md5=87cd44764ade079e9f9c16a2366bbd29

      Also what does “Registers a 32-bit in-process server DLL.” mean ?

      Thanks

    • ww2

      Rofl, I found netCut 2.8.1 and 2008 editions oO – it’s weird. Also it was on first page in Google in my language ;)

    • M4573R

      Thank you, I downloaded it and it works great :). It’s funny to annoy other people in my network xD.

    • M4573R

      Oh, and it works on Xbox 360 and Playstations too :).

    • jak

      sir actully i want link 2 dwnload netcut2.0.8 .so pls help me.

    • Dikei

      A simple way to detect Netcut is to open command console and type “arp -a”. If there is more than one gateway, some body is using Netcut, or worse: spoofing your network.

    • Dikei

      BTW, this tool work of protocol level. So it’s can cut off any network devices that use ARP

    • Mike

      to ww2, taken from arcai.com:”netCut latest version is 2.0.8, if you are running version earlier than that, or newer than that, it’s not clean”,”netCut version before 2.0 (i.e: 1.5) is defeat able by anti-netcut/no Cut”.

    • ~(o.o)~

      It is easy to find the download link for the 2.0.8 version of netcut. I found this tool to be interesting. Cheers Raymond. As always, you are giving your subscribers good tips. :)

    • Mr.Sorry

      Im i use this software to disconnect someone, will they able to find out this?

    • flame

      Thx, for the md5..

    • http://www.magicsacekimi.com/ saç ekimi

      post thank you for the beautiful share with us, respect

    • anon

      does this work for wireless networks?

    • Duke, The Hacker

      Hey Frends,

      Today I found the Netcut v2.08 software with the matching SHA-1 and MD5 what Raymond gave us.
      I cofirmed the hash values with Hashtab(http://download.cnet.com/HashTab/3000-2248_4-84837.html)

      So, if somebody wants Netcut 2.08 please mail me at hackerduke(at)Gmail(dot)com I will mail you back the file and you can verify the Hash values with what Raymond provided in the above comments.

    • Duke, The Hacker

      Oh I forgot to say Please mentions the software name NETCUT 2.08 in the subject line.

    • John

      Is there a linux equivalent to netcut ?

    • thebetaguy

      Raymond,

      Can you suggest a similar tool that works on Office Wi-Fi. I tried Netcut but it doesn’t work.

      And has anybody successfully testes Netcut on Windows 7?

      Thanks.

    • louph

      anyone used this tool on a network of around a 100pc’s? I noticed that once “cut off” and I resume again, I need to restart the pc for it to gain net access again. is this normal?

    • thebetaguy

      Raymond,

      I am eagerly waiting for your reply.

      Thanks.

    • anish

      raymond ,
      i tried to download net cut from the donwload link u provided but as soon as the web page opens it asks for username and password plzz help
      regards,

      Anish

    • http://Pon Ponchi

      Baje el NetCut ya que un tipo cada que me salgo de la oficina utiliza mi IP para navegar en internet con mayor velocidad pero el problema que al ser mi IP con muchos permisos a servidores y routers existe peligro de que me sabotee, hay alguna herramienta para que mi IP solo se utilice con mi direccion MAC ??

    • UNIQUE

      here,’s the link..it work.
      get to the bottom of the page n hit “Click Me” Supported by IDWS

      install n enjoy it… :D

    • nicholas

      Netcut cant install in window 7.. anyone pls help me

    • ali

      to use netcut on windows 7:

      1. right click on netcut source and choose properties
      2. choose compatibility then at compatibility mode click “Run this program in compatibility mode for:” and choose Windows Service pack 1 from the list below, click OK

      now it should work fine and winpcap setup too

    • Samir

      Hi, guys ! I need some help. I have downloaded the program from arcai.com. It came in the format of a zipped file. I unzipped it but it shows itself as URL file. Whenever i double click on it, it shows me the open with option and lists a bunch of programs i should open with. I have Win Xp laptop with Winpcap installed. Any thoughts ??

    • george

      i have tried finding this software for so long.ray can u plz send me the software.duke the hacker i tried sending u an email as u said but it seems the email address u provided is incorrect.my email is georgeboateng18 @ yahoo . com. thanks

    • aha

      Raymond, would you please tell which file version are these checksums?
      netcut’s installer , ok but what version?

      This is the netcut’s installer SHA-1 and MD5.

      SHA-1: 742445A7EC52EFC22632BB2D1D87F69D1E27E16B
      MD5: 87CD44764ADE079E9F9C16A2366BBD29

    • wannabe

      SHA-1: 742445A7EC52EFC22632BB2D1D87F69D1E27E16B
      MD5: 87CD44764ADE079E9F9C16A2366BBD29

      version : 2.0.6.0
      created : 11/23/2006

    • bernatte

      SHA-1: 742445A7EC52EFC22632BB2D1D87F69D1E27E16B
      MD5: 87CD44764ADE079E9F9C16A2366BBD29

      version : 2.0.6.0
      created : 11/23/2006

      there’s a patch for 3.0

    • qwer

      I have downloaded and installed the program but it will not start. if someone cane give me an advise

    • Jacqis

      do you guys know why my network adapter is not detected at the netcut?.
      im running windows vista at my laptop…

    • Sat

      to use netcut on windows 7:

      1. right click on netcut source and choose properties
      2. choose compatibility then at compatibility mode click “Run this program in compatibility mode for:” and choose Windows Service pack 1 from the list below, click OK

      now it should work fine and winpcap setup too

      winpcap not working on 64 bit window!!!!!!!!!
      help.

    • http://www.arcai.com netcut

      2.0.9 released , it support windows 7 both 32 bit and 64 bit

      http://www.arcai.com/download.html

    Copyright © 2005-2012 - Raymond.CC Blog