Snort mailing list archives
Re: Difference between drop and reject rules
From: Russ <rucombs () cisco com>
Date: Thu, 12 Feb 2015 07:17:19 -0500
On 2/12/15 2:33 AM, Mark Greenman wrote:
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":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.
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 againOn Mon, Feb 9, 2015 at 4:24 PM, Russ <rucombs () cisco com <mailto:rucombs () cisco com>> wrote:You have active responses enabled with the configuration below. That causes Snort to send TCP resets or ICMP unreachables when asession 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> <mailto: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><mailto:mark.greenman.014 () gmail com> <mailto: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 ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your 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/ _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net <mailto:Snort-users () lists sourceforge net><mailto:Snort-users () lists sourceforge net> <mailto:Snort-users () lists sourceforge net> Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visithttp://blog.snort.org to stay current on all the latest Snort news! ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your 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/ _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net <mailto:Snort-users () lists sourceforge net> Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visithttp://blog.snort.org to stay current on all the latest Snort news!
------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your 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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Current thread:
- Difference between drop and reject rules Mark Greenman (Feb 07)
- Re: Difference between drop and reject rules Joel Esler (jesler) (Feb 07)
- Re: Difference between drop and reject rules Mark Greenman (Feb 08)
- Re: Difference between drop and reject rules Russ (Feb 09)
- Re: Difference between drop and reject rules Mark Greenman (Feb 11)
- Re: Difference between drop and reject rules Russ (Feb 12)
- Re: Difference between drop and reject rules Mark Greenman (Feb 12)
- Re: Difference between drop and reject rules Mark Greenman (Feb 12)
- Re: Difference between drop and reject rules Russ (Feb 12)
- Re: Difference between drop and reject rules Mark Greenman (Feb 08)
- Re: Difference between drop and reject rules Joel Esler (jesler) (Feb 07)