[Bro] Questions about Bro Capabilities

Nicholas Weaver nweaver at ICSI.Berkeley.EDU
Thu Oct 4 08:07:42 PDT 2007

On Thu, Oct 04, 2007 at 11:03:07AM -0400, Reed Porada composed:
> >Does this make any sense?
> In general I understand what you and Nick have proposed.  I do not  
> know how to get the flow-ids out.  Are the http_request_stream$id's  
> unique?  One thing that was suggested by a co-worker after looking at  
> the output, is that we have a timestamp, src ip/port, dst ip/port.   
> In general within a pcap that is sufficient for identifying a packet,  
> my guess as to why you have not suggested this option is that the  
> network_time() that is being used in output does not relate to the  
> stream.  Is there anyway to get that to have a closer correlation to  
> the stream?  I am also curious as to how to interpret the output from  
> http-body.  What does each printout from http_entity_data events  
> represent?  Is it a new packet, or an update to the stream that could  
> be the sum of an arbitrary number of packets?

with most hosts, the 5-tuple should be unique (SRC ip/port,DST
ip/port,proto).  So just record the 5-tuple of anything to exclude in
a file, and then use that file in the second pass to filter out those

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