[Gllug] A little OT: On the limits of VLANs

[Sharon Kimble]

On 05/14/2010 10:43 PM, general_email at technicalbloke.com wrote:
> Dan wrote:
>    
>> On Fri, Apr 30, 2010 at 12:51 AM, general_email at technicalbloke.com<
>> general_email at technicalbloke.com>  wrote:
>>
>>
>>      
>>> Also I was advised of a potential "mac flooding"? attack that might
>>> force a switch to fail over into a hub mode of operation. I'd also like
>>> to check if my new switch is vulnerable to that attack, any ideas what
>>> its actually called, or what tool(s) can create it?
>>>
>>>
>>>        
>> If your still interested.  On Cisco stuff I think it's called 'port
>> security'.  This will prevent a single port from allowing an undesirable
>> number of MAC address's being used by one port.  Thus you can't often
>> overflow the CAM table which stores the MAC addressing to physical port
>> mapping.  If this isn't enabled though you can overflow the CAM table and
>> then the device will move into the failopen mode and basically operate as a
>> hub.
>>
>> To test you can use macof which is part of dSniff and comes with Backtrack
>> Linux.
>>
>> What simple version of Linux did you go for in the end?  I've used Xubutu&
>> Fluxbuntu in the past.
>>
>> Dan
>>
>>
>>      
>
> I am interested thanks v.much, will d/l a copy of backtrack :)
>
> Still using Ubuntu Jaunty while I'm developing, hopefully getting a new
> box in the next few weeks so I can dedicate my old one to it. Still not
> decided what to run on it yet tho, considering Xubuntu as I like the
> Ubuntu repos but as it make very little practical difference I wonder if
> I shouldn't use it as an opportunity to branch out and try something
> different, maybe centOS? Is it easy enough to get a desktop installed on
> top of that, anyone?
>
>    
CentOS is very easy to use a desktop with, i use it all the time, and 
with the rpmforge and EPEL repos most bases are covered. And the new 
upgrade to CentOS 5.5 is due out in the next couple of days so you'll be 
able to benefit from that too.

Sharon.

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