[Snort-users] Grouping connections

Joel Esler jesler at ...1935...
Wed Apr 22 12:41:01 EDT 2009


Are you looking for the "flush_on_alert" keyword in Stream5?

Joel

2009/4/22 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>

> I saw in the forum a person asking (in 2007) something that is the same I
> want:
>
> "so that i would be able to capture mails containing viagra. I am using
> preprocessor stream4 reassmebly so that i could get the entire mail instead
> of only the packet containing that string 'viagra'. "
>
> I don't need the total packet, but just to identify that as one big-packet,
> not only the packet containing the string 'viagra', but all the e-mail (the
> big-packet).
>
>
> 2009/4/22 Ulisses Araújo Costa <ulissesaraujocosta at ...11827...>
>
>> 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
>>>>
>>>
>> Ah! 'tag' keyword. I'm sorry, seems I read that too fast.
>> Unfortunately this seems to be limited relative to the size of something:
>>
>> tag: <type>, <count>, <metric>, [direction];
>>
>> count
>>       • <integer> - Count is specified as a number of units. Units are
>> specified in the <metric> field.
>>
>> :S
>>
>> I want something completely dynamic.
>>
>>
>>
>>>
>>>> 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/>
>>>
>>
>>
>>
>> --
>> 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
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