[Snort-users] Grouping connections

Joel Esler jesler at ...1935...
Thu Apr 23 11:02:56 EDT 2009


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/>
>>>
>>>
>>> ------------------------------------------------------------------------------
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>>> around Java (TM) technology - register by April 22, and save
>>> $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco.
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>>
>>
>
>
> --
> Ulisses Costa - http://caos.di.uminho.pt/~ulisses/
>



-- 
joel esler | Sourcefire | gtalk: jesler at ...1935... | 302-223-5974 |
http://twitter.com/joelesler
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