[Snort-users] Frag3 doc discrepancy

Min Qiu mqiu at ...13422...
Wed Aug 17 11:08:35 EDT 2005


should not be able to see packet with ttl=0 in the first place.
The only way one can see it is being attacked by an immediate
neighbor.

Min

> -----Original Message-----
> From: Eric Maheo [mailto:eric.maheo at ...8860...] 
> Sent: Wednesday, August 17, 2005 12:55 PM
> To: Matthew K. Lee
> Cc: snort-users at lists.sourceforge.net
> Subject: Re: [Snort-users] Frag3 doc discrepancy
> 
> 
> and in the source spp_frag.c, it's not 100% sure :)
> 
> #define FRAG3_MIN_TTL     1     /* min acceptable ttl (should 
> be 1?) */
> 
> Eric Maheo
> 
> On Wed, 2005-08-17 at 11:32 -0500, Matthew K. Lee wrote:
> > To whom it may concern:
> > 
> > In the snort.conf distributed in the 2.4 snapshot rule set, 
> Frag3 has
> > a minimum ttl description of:
> > 
> > #   min_ttl: Minimum acceptable TTL for a fragment, frags 
> with TTLs below this
> > #            value will be discarded.  Default value is 0.
> > 
> > and the README.frag3 document has this to say:
> > 
> >      min_ttl <value> - Minimum acceptable TTL value for a 
> fragment packet.
> >                        Default is 1.
> > 
> > Perhaps some clarification is in order...
> > 
> > Thanks,
> > 
> > Matthew Lee
> > 
> > 
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