[Bro] unmatched_HTTP_reply in weird.log

Gary Faulkner gfaulkner.nsm at gmail.com
Thu Jul 24 11:51:05 PDT 2014


Recently my Bro cluster started producing a lot of unmatched_HTTP_reply 
messages in weird.log and seemed to also stop logging outbound GET 
requests in http.log. I did some testing by following both Bro logs as I 
browsed to various websites and it looks like every time I visit a new 
site, the initial GET request doesn't get logged and a weird is 
generated. As such I'm wondering if this may be an indication that Bro 
is only seeing half the conversation? I can trace the change in logging 
behavior to a specific day, but I can't find any indication that there 
were any changes locally that would have stopped Bro from seeing any 
particular traffic. Anyone thoughts? Am I interpreting the logs correctly?


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