Re: Network Variables

["Seth Dunn" <seth () d2ms com>]

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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