Re: promiscus mode

[Jim Nelson <james4765@cwazy.co.uk>]

Ray Olszewski wrote:
> At 12:30 PM 1/25/2005 +0530, Muruganandam wrote:
> 
>> Hi all,
>>
>>   How to enable the Promiscus mode in the kernel,inorder to capture the
>> packets.Advance Thanks
> 
> 
> It would be easier to answer this question if I better understood the 
> level you are asking it at.
> 
> The beginner-level answer to it is to use an application and associated 
> library (e.g, tcpdump or ethereal, and libpcap) that supports setting 
> promiscuous mode.
> 
> For the details of how to set it in a NIC driver, I'd suggest referring 
> to the source for libpcap; my quick scan of it leads me to suggest 
> checking the pcap_open_live() function call.
> 
> Of course, you need root access to do any of this.
> 
> 

And it may not work if you have some obscure hardware - all the common Ethernet 
drivers and chipsets support promiscuous mode, but some of the older boards and 
embedded chips may suprise you.

Jim
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