[Snort-users] Grouping connections

Ulisses Araújo Costa ulissesaraujocosta at ...11827...
Mon Apr 27 11:18:23 EDT 2009


2009/4/27 Joel Esler <jesler at ...1935...>

> So, I think you need to define, to us, what you mean by "session"
> "connection" and "packets".  Clearly, we are not understanding each other.
>

?  This is getting ridiculous...
Joel, one TCP session could have multiple connections right? Like when you
are downloading a webpage, is just one session, but multiple connections...
Each connection is made of several packets. That is, the packet is the
atomic unit.


> Joel
>
> 2009/4/27 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>
> One session have many connection. And one connection have many packets... I
>> think the problem is that  don't explain what connection means to me...
>>
>>
>> 2009/4/24 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>>
>>> I want identify connection not sessions. I want more detail:
>>> connections...
>>>
>>> 2009/4/24 Joel Esler <jesler at ...1935...>
>>>
>>> A session is made up of connections.  Now I am throughly confused about
>>>> what you are asking for.
>>>> J
>>>>
>>>> 2009/4/24 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>>>>
>>>> Joel Esler, with 'tag:session' I just can identify the session. I want
>>>>> be able to identify connections.
>>>>>
>>>>> 2009/4/23 Joel Esler <jesler at ...1935...>
>>>>>
>>>>> The fact that the alert took place tells you that flow X <> Y happened.
>>>>>>
>>>>>>
>>>>>> J
>>>>>>
>>>>>> 2009/4/22 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>>>>>>
>>>>>>> Hi Leon,
>>>>>>>
>>>>>>> what I want is to record that the request X have the response Y. What
>>>>>>> I explained, is that probably the request X is just a packet, but the
>>>>>>> response Y is 4 packets. The only thing I want to know is that the flow X <>
>>>>>>> Y happened.
>>>>>>>
>>>>>>> 2009/4/22 Leon Ward <seclists at ...14165...>
>>>>>>>
>>>>>>> Hi.
>>>>>>>>
>>>>>>>> Sorry I don't think I understand what you are asking. Can you share
>>>>>>>> the goal you are trying to achieve rather than the method you are trying to
>>>>>>>> resolve it by?
>>>>>>>>
>>>>>>>> >The idea is make Snort just consider that as 2 states (me making
>>>>>>>> the request and google sending the response). The problem is I want to make
>>>>>>>> that to connections, not sessions.
>>>>>>>>
>>>>>>>> If you need to differentiate between data in each flow direction,
>>>>>>>> take a look at "flow".
>>>>>>>>
>>>>>>>> -Leon
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> 2009/4/22 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>>>>>>>>
>>>>>>>>> Joel,
>>>>>>>>>
>>>>>>>>> that's what I said:
>>>>>>>>>
>>>>>>>>> "
>>>>>>>>> The problem is I want to make that to connections, not sessions.
>>>>>>>>>
>>>>>>>>> If it was sessions I can use the 'flag' keyword.
>>>>>>>>> "
>>>>>>>>>
>>>>>>>>> But I *don't* want sessions.
>>>>>>>>>
>>>>>>>>> 2009/4/22 Joel Esler <jesler at ...1935...>
>>>>>>>>>
>>>>>>>>>> Take a look at the tag keyword.
>>>>>>>>>>
>>>>>>>>>> http://www.snort.org/docs/snort_htmanuals/htmanual_284/node373.html
>>>>>>>>>>
>>>>>>>>>> The flags keyword simply will trigger on the presence of certain
>>>>>>>>>> TCP flags set in the packet.  This is probably not what you want.
>>>>>>>>>>
>>>>>>>>>> J
>>>>>>>>>>
>>>>>>>>>> 2009/4/22 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>>>>>>>>>>
>>>>>>>>>>>  Hello,
>>>>>>>>>>>
>>>>>>>>>>> I'm using Snort in a project. I'm wondering if with Snort I can
>>>>>>>>>>> group packets from the same connection. For example: if I request
>>>>>>>>>>> google.com, I just send one packet but the response came in
>>>>>>>>>>> (imagine) 4 packets. The idea is make Snort just consider that as 2 states
>>>>>>>>>>> (me making the request and google sending the response). The problem is I
>>>>>>>>>>> want to make that to connections, not sessions.
>>>>>>>>>>>
>>>>>>>>>>> If it was sessions I can use the 'flag' keyword. Now I'm seeing
>>>>>>>>>>> if the way is using preprocessors, in this case the HTTP preprocessor.
>>>>>>>>>>>
>>>>>>>>>>> Can you help me?
>>>>>>>>>>>
>>>>>>>>>>> Best Regards,
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/<http://caos.di.uminho.pt/%7Eulisses/>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> ------------------------------------------------------------------------------
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>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> joel esler | Sourcefire | gtalk: jesler at ...1935... |
>>>>>>>>>> 302-223-5974 | http://twitter.com/joelesler
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/<http://caos.di.uminho.pt/%7Eulisses/>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> ------------------------------------------------------------------------------
>>>>>>>>> Stay on top of everything new and different, both inside and
>>>>>>>>> around Java (TM) technology - register by April 22, and save
>>>>>>>>> $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco.
>>>>>>>>> 300 plus technical and hands-on sessions. Register today.
>>>>>>>>> Use priority code J9JMT32. http://p.sf.net/sfu/p
>>>>>>>>> _______________________________________________
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>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/<http://caos.di.uminho.pt/%7Eulisses/>
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> joel esler | Sourcefire | gtalk: jesler at ...1935... | 302-223-5974
>>>>>> | http://twitter.com/joelesler
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/<http://caos.di.uminho.pt/%7Eulisses/>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> joel esler | Sourcefire | gtalk: jesler at ...1935... | 302-223-5974 |
>>>> http://twitter.com/joelesler
>>>>
>>>
>>>
>>>
>>> --
>>> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/<http://caos.di.uminho.pt/%7Eulisses/>
>>>
>>
>>
>>
>> --
>> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/<http://caos.di.uminho.pt/%7Eulisses/>
>>
>
>
>
> --
> joel esler | Sourcefire | gtalk: jesler at ...1935... | 302-223-5974 |
> http://twitter.com/joelesler
>



-- 
Ulisses Costa - http://caos.di.uminho.pt/~ulisses/
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