[Snort-users] False positive

Garcia-Zamora, Manuel zamoram at ...15640...
Wed May 16 10:27:53 EDT 2012


The ports are not within the standard , I think,   so it is a bad formed packet

https://en.wikipedia.org/wiki/DHCP

this will be an DHCP offer or acknowledgement  from source 0.0.0.0 what is wrong. 


Regards,


-----Original Message-----
From: Joel Esler [mailto:jesler at ...1935...] 
Sent: 16 May 2012 14:41
To: Philip Edwards
Cc: snort-users at lists.sourceforge.net
Subject: Re: [Snort-users] False positive

Is there any way you can provide some pcaps to illustrate your FP?

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire


On May 16, 2012, at 7:08 AM, Philip Edwards wrote:

> 
> 
> Hi,
> 
> I have recently installed snort on ubuntu and am just attempting to tune out the noise.
> For some reason the BAD-TRAFFIC (same source and destination) rule is firing on DHCP broadcasts.
> 
> The source is 0.0.0.0 port 67 and the destination is 255.255.255.255 port 68.
> 
> Since the source and destination are different can anyone clue me in?
> 
> Thanks
> 
> Phil Edwards=

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