Re: Difference between drop and reject rules

[Mark Greenman <mark.greenman.014 () gmail com>]

Thanks. It now works as you said.

On Thu, Feb 12, 2015 at 3:47 PM, Russ <rucombs () cisco com> wrote:

> On 2/12/15 2:33 AM, Mark Greenman wrote:
>
>  Thanks for your response and sorry that I'm answering a little late.
>  You are right sir. But I think active responses are needed for "reject"
> rules. Actually, based on the manual snort must sent TCP reset or ICMP
> unreachable for reject rules and not for the drop rules. I think what I see
> is that "drop" and "reject" work exactly the same.
>
> They are the same only because your config tells Snort to handle drops as
> rejects.  This config allows drops and rejects to work "at face value":
>
> config response: attempts 1
> #
> preprocessor stream5_global: track_tcp yes, track_udp no
> preprocessor stream5_tcp: policy linux
> #
> drop tcp any any -> any 80 ( sid:1; msg:"block only"; content:"foo"; )
> reject tcp any any -> any 80 ( sid:2; msg:"block and reject";
> content:"bar"; )
>
>
>  Thanks again
>
> On Mon, Feb 9, 2015 at 4:24 PM, Russ <rucombs () cisco com> wrote:
>
> >  You have active responses enabled with the configuration below.  That
> > causes Snort to send TCP resets or ICMP unreachables when a session is
> > blocked.
> >
> > preprocessor stream5_global: track_tcp yes, \
> > ...
> >    max_active_responses 2, \
> >    min_response_seconds 5
> >
> >
> > On 2/8/15 5:22 AM, Mark Greenman wrote:
> >
> > The configuration file, the rules and a pcap file captured at the
> > client side are attached to the email.
> > Thanks
> >
> > On 2/7/15, Joel Esler (jesler) <jesler () cisco com> <jesler () cisco com> wrote:
> >
> >  Drop shouldn't send anything.  So if you are seeing this, we need your
> > configuration, rules, and a pcap.
> >
> > --
> > Joel Esler
> > Sent from my iPhone
> >
> > On Feb 7, 2015, at 8:29 AM, Mark Greenman
> > <mark.greenman.014 () gmail com<mailto:mark.greenman.014 () gmail com> <mark.greenman.014 () gmail com>> wrote:
> >
> > Hi. Do you know why both drop and reject rules work exactly the same. The
> > manual says that drop rules must not sent RST packets but they do? Does
> > anyone know the reason?
> >
> > Thanks
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hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net/

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