On Aug 25, 2014, at 4:40 PM, Vlad Grigorescu <[email protected]> wrote:

> Does it makes sense that following a connection teardown, if a SYN-ACK is 
> seen, a new connection begins, instead of using the existing connection? I 
> can probably grab a PCAP if necessary.

Actually, I’m thinking it may already work like you expect in many “normal” 
situations.  One special case I can remember (there may be others) is that Bro 
may defer closing out a connection even if it sees the teardown control packets 
when it thinks it may be possible to fill in a content gap (i.e. it thinks 
there’s packets coming in out of order, but maybe in your case it’s just never 
seen at all).  If that doesn’t fit with what you saw and you’ve got a pcap you 
can send me, I can try to make sense of it.

- Jon
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