Snort mailing list archives

Re: Difference between drop and reject rules


From: Mark Greenman <mark.greenman.014 () gmail com>
Date: Thu, 12 Feb 2015 11:03:28 +0330

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.
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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