[Bro] TCP Conn Log

Azoff, Justin S jazoff at illinois.edu
Wed Apr 5 09:40:52 PDT 2017


Oh! there is this script that may help:

https://github.com/corelight/bro-long-connections


-- 
- Justin Azoff

> On Apr 5, 2017, at 12:28 PM, Johanna Amann <johanna at icir.org> wrote:
> 
> Hi Mike,
> 
> I am currently not aware of any way to accomplish this without
> modifications to the core. You can change the timeout that Bro uses for
> TCP connections (the time after which its expires a connection, if it does
> not see any packets) by changing tcp_inactivity_timeout; depending on your
> specific application, maybe that might be good enough.
> 
> Johanna
> 
> On Mon, Apr 03, 2017 at 02:49:21PM +0200, mike anastasakis wrote:
>> Hello,
>> 
>> I am using Bro for a project and I have a question regarding it's
>> capabilities.
>> Currently when I have a long TCP connection that includes frequent TCP Keep
>> Alive messages, bro is reassembling the whole network trace into one
>> connection and presents it in conn.log with a big duration value. Is it
>> possible to make bro split up TCP connections into smaller fragments based
>> on a interval I set up or at least whenever a TCP Keep alive handshake
>> takes place?
>> 
>> 
>> Regards,
>> Mike
> 
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> 
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