Nmap Development: Re: I am not getting the MAC Details

[Andreas Ericsson <ae () op5 se>]

uday kumar kunta wrote:
> Hi All,
>    
>    I am running the command  "nmap -O -oX test.xml <IP addresses>" ,it is not giving the MAC address and Mac vendor 
> deatils.
>   Some times it is providing the MAC details & some times it is not providing.
>   Can you please tell me if there is any other option to finding out the MAC details.
>    

MAC address scanning only works over layer 2 networks. As soon as the 
packets pass a router it can no longer be determined. I haven't looked 
at that particular piece of code, but I suspect nmap detects this and 
doesn't print the MAC-address for routed packets.

-- 
Andreas Ericsson                   andreas.ericsson () op5 se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231


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