Re: AW: security-basics Digest 18 Jun 2003 22:09:15 -0000 Issue 618

["Mitchell Rowton" <mitchell () attackprevention com>]

All connections on a Hub are in the same collision domain (meaning they 
all see (can sniff) each others traffic)

All connections on a switch are in separate collision domains (meaning 
they only see (sniff) traffic directed to them and broadcast/multicast 
traffic)


Mitchell


> why is it harder to sniff over a switced network?  i understand it's
> becasue of the switch (natch), but what makes it more difficult?
> dave
>
>
>
> On Wed, 25 Jun 2003, Meidinger Christopher wrote:
>
> > Hello Hilal,
> >
> > Yes, there are many tools that will do that. dsniff, ettercap, 
ethereal and
> > MANY others will read your password as it goes by on the wire. It is
> > slightly more difficult on a switched network, but it can still be 
done.
> > You should not use telnet at all, use ssh (www.openssh.org) 
instead. The
> > windows client PuTTY is the most common choice to connect over ssh 
from
> > windows. As far as starting an ssh server on the firewall, you 
should be
> > able to do that in the same way that you started the telnet server.
> >
> > If you need more exact help, post to the list what type of firewall 
you are
> > using, and i am certain someone will help you get started.
> >
> > (Disclaimer: based on your question, you should [IMHO] definately 
read up a
> > bit on security before configuring a firewall)
> >
> > badenIT GmbH
> > System Support
> >
> > Chris Meidinger
> > Tullastrasse 70
> > 79108 Freiburg
> >
> >
> > -----Ursprüngliche Nachricht-----
> > Von: Hilal Hussein [mailto:hilalma () hotmail com]
> > Gesendet: Tuesday, June 24, 2003 10:08 AM
> > An: bugtraq () planetcobalt net; security-basics () securityfocus com
> > Betreff: Re: security-basics Digest 18 Jun 2003 22:09:15 -0000 
Issue 618
> > Hello All,
> >
> > i am not sure if i am asking the right question within the same 
subject,but
> > i am configuring the firewall throught the telnet connecting / from 
winxp
> > workstation.
> >
> > Is there any possibility for any internal user to use any tools 
that will
> > haijack my telnet password - password for the firewall too!, and 
what are
> > the measurements for securing the telnet session.
> >
> > with regards,
> > Hilal Hussein
> >
> > _________________________________________________________________
> > STOP MORE SPAM with the new MSN 8 and get 2 months FREE*
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> >
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---------------------------------------------------------------------------
Evaluating SSL VPNs' Consider NEOTERIS, chosen as leader by top analysts!
The Gartner Group just put Neoteris in the top of its Magic Quadrant,
while InStat has confirmed Neoteris as the leader in marketshare.
     
Find out why, and see how you can get plug-n-play secure remote access in
about an hour, with no client, server changes, or ongoing maintenance.
          
Visit us at: http://www.neoteris.com/promos/sf-6-9.htm
----------------------------------------------------------------------------