RE: Malfunction with nmap

[H Dixon <tai_mai_shu2002 () hotmail com>]

Thanks for your guys help so far. I have some more information for you guys to help me decipher.

quote: Michael: "Do you loose your connection after the other stealth scans(-sS, -sX, -sA)?"

A: yes, I still lose the connection.


Even though I have internet connection I can't ping any website e.g. www.google.com.  However, I can still connect to 
the website via webbrowser. Also, I finally made my router cooperate and work. ( I was, for a bout a week directly 
connected to the cable box without the router. So now instead of getting about 80% arp requests. I get about 30% 'tcp 
checksum incorrect'. That's beside the point. I Surfed the web a bit and someone requested to start windows in safe 
mode with net connection. And now i can ping! Which leads me to believe some form of software i have installed is not 
letting me ping/use nmap. I tried using nmap (in safe mode) but i'm getting: 

Initiating Ping scan at 21:38
dnet: Failed to open device eth0
QUITING!

Strange because I'm on the net right now. :\   I'll try using a system restore point but if you guys have any other 
idea i'll most likely try it.

thanks!!!!!!
Heath

> Date: Sat, 6 Sep 2008 15:49:43 -0400
> From: mpattrick () rhinovirus org
> To: tai_mai_shu2002 () hotmail com
> Subject: Re: Malfunction with nmap
> CC: bmenrigh () ucsd edu; nmap-dev () insecure org
>
> On Sat, Sep 6, 2008 at 12:36 PM, H Dixon <tai_mai_shu2002 () hotmail com> wrote:
> > Thanks for your quick reply Brandon. I updated my NIC. For a second I actually thought Nmap was working through but 
> > the connection still died (It doesn't show i lost my connection on my network device--just doesn't let me 
> > ping/connect to a website). However I might have found the culprit. Using the ethereal sniffer I discovered that in 
> > one minute of the scan i have 56 UDP packets and 2,856 ARP requests.  So, that's about 48 Arp requests a second. So 
> > we can be pretty much assured it's not nmap. Just my card can't handle all the requests at once? What's your take 
> > on the situation. Thanks,
> > Heath
>
> While that amount of ARP packets is excessive, you would be hard
> pressed to find a computer capable of running windows XP that couldn't
> handle that amount of traffic - 50 arp packets per second is about
> 3KB/sec.
>
> Do you loose your connection after the other stealth scans(-sS, -sX, -sA)?
>
> Cheers,
> Michael

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