Re: Network Variables

[James Lay <jlay () slave-tothe-box net>]

Your filter should be the last thing, so shift that -T to in front of 
it.  Any of the winsnort folks wanna chime in here?

James

On 2013-05-02 08:42, Seth Dunn wrote:
> To make the command line more simple, I did this::
> C:\>d:\snort\bin\snort -c d:\snort\etc\snort2.conf -i2 'not net
> 10.10.0.0/24' -T
>
> I get this result::
> pcap DAQ configured to passive.
> The DAQ version does not support reload.
> Acquiring network traffic from
> "\Device\NPF_{62D05284-3337-4ED4-8151-E1D6D292691
> 8}".
> ERROR: Can't set DAQ BPF filter to ''not net 10.10.0.0/24' -T' (╠πQ)!
> Fatal Error, Quitting..
>
>
>
> -----Original Message-----
> From: James Lay [mailto:jlay () slave-tothe-box net]
> Sent: Thursday, May 02, 2013 10:31 AM
> To: Snort
> Subject: Re: [Snort-users] Network Variables
>
> This worked like a champ for me:
>
> [08:19:26 me@box:~/snort$ sudo snort -c snort.conf 'not net
> 10.10.0.0/24 and dst host 10.75.45.1 && dst port 80 or not net
> 10.30.0.0/24 and dst host 10.75.45.1 && dst port 80'
> Running in IDS mode
>          --== Initializing Snort ==--
> Initializing Output Plugins!
> Initializing Preprocessors!
> Initializing Plug-ins!
> <snip>
> Decoding Ethernet
>
>          --== Initialization Complete ==--
>
>     ,,_     -*> Snort! <*-
>    o"  )~   Version 2.9.4.6 GRE (Build 73)
>     ''''    By Martin Roesch & The Snort Team:
> http://www.snort.org/snort/snort-team
>             Copyright (C) 1998-2012 Sourcefire, Inc., et al.
>             Using libpcap version 1.1.1
>             Using PCRE version: 8.12 2011-01-15
>             Using ZLIB version: 1.2.3.4
>
>             Rules Engine: SF_SNORT_DETECTION_ENGINE  Version 1.17 
> <Build 18>
>             Preprocessor Object: SF_SDF  Version 1.1  <Build 1> 
> <snip>
>             Preprocessor Object: SF_DNP3  Version 1.1  <Build 1>
> Commencing packet processing (pid=28871)
>
>
> James
>
> On 2013-05-02 08:16, Seth Dunn wrote:
> > Same.
> > It doesn't matter if the call is using the .conf file, or through 
> > the
> > -F command line switch
> >
> > -----Original Message-----
> > From: James Lay [mailto:jlay () slave-tothe-box net]
> > Sent: Thursday, May 02, 2013 10:12 AM
> > To: Snort
> > Subject: Re: [Snort-users] Network Variables
> >
> > What happens when you try it via command line?
> >
> > On 2013-05-02 08:09, Seth Dunn wrote:
> > > Also of note.
> > > It seems that if snort starts with a bpf file configured....then 
> > > for
> > > whatever reason, all traffic is no longer monitored, even though
> > > snort has started.
> > > So while this rule::
> > > not net 10.10.0.0/24 and dst host 10.75.45.1 && dst port 80 or not
> > > net
> > > 10.30.0.0/24 and dst host 10.75.45.1 && dst port 80
> > >
> > > is pretty specific.....
> > > I have another rule set in my local.rules file that should alert on
> > > any FTP attempt to IP 10.76.65.1....and if the bpf file is 
> > > configured
> > > for snort, then the attempt is not alerted by snort.
> > > If I remove the bpf file from being used, then any FTP attempt is
> > > again alerted.
> > >
> > > FROM: James Lay [mailto:jlay () slave-tothe-box net]
> > > SENT: Thursday, May 02, 2013 8:10 AM
> > > TO: Snort
> > > SUBJECT: Re: [Snort-users] Network Variables
> > >
> > > Quotation marks may be needed…try appending via command line as 
> > > well.
> > >
> > > James
> > >
> > > On May 2, 2013, at 5:50 AM, Seth Dunn <seth () d2ms com [1]> wrote:
> > >
> > > What is DAQ? I have seen that, but have no idea what that is.
> > >
> > > As far as my bpf file goes, if it is like this::
> > >
> > > #not net 10.10.0.0/24 and not net 10.30.0.0/24
> > >
> > > not net 10.10.0.0/24 and dst host 10.75.45.1 && dst port 80 or not
> > > net
> > > 10.30.0.0/24 and dst host 10.75.45.1 && dst port 80
> > >
> > > It will fail with::
> > >
> > > Reading filter from bpf file: D:Snortetcignore2.bpf
> > >
> > > ERROR: short read D:Snortetcignore2.bpf (169 != 170)
> > >
> > > Fatal Error, Quitting..
> > >
> > > If I remove the commented line, then snort starts fine.
> > > If I try to have multiple lines in the file, (all being rules, no
> > > comments) the it will fail with a similar error as above.
> > > I have never seen a DAQ error.
> > >
> > > FROM: Russ Combs [mailto:rcombs () sourcefire com [2]]
> > > SENT: Thursday, May 02, 2013 12:08 AM
> > > TO: waldo kitty
> > > CC: snort-users () lists sourceforge net [3]
> > > SUBJECT: Re: [Snort-users] Network Variables
> > >
> > > Snort does allow comments in the BPF file, starting with # to end 
> > > of
> > > line. If there is a syntax error, you should see something like:
> > >
> > > ERROR: Can't set DAQ BPF filter to '
> > >
> > > ...
> > >
> > > ' (pcap_daq_set_filter: pcap_compile: syntax error)!
> > >
> > > Fatal Error, Quitting..
> > >
> > > What DAQ are you using? Please send the BPF file that fails and the
> > > error that you get.
> > >
> > > On Wed, May 1, 2013 at 10:07 PM, waldo kitty 
> > > <wkitty42 () windstream net
> > > [4]> wrote:
> > >
> > > On 5/1/2013 13:09, Seth Dunn wrote:
> > > > But any ideas why snort fails to start if I add in a '#' to 
> > > > comment
> > > a
> > > > line??
> > >
> > > i have no clue but it sounds like a coding error not allowing 
> > > comment
> > > lines i the BPF file... only joel or one of the snort dev guys can
> > > tell us that... or possibly a code diver who can root around in the
> > > snort code ;)
> > >
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> >
> >
> >
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