[Bro-Dev] [JIRA] (BIT-1480) ERSPAN Supprt

[Matthew Domko (JIRA)]

Matthew Domko created BIT-1480:
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             Summary: ERSPAN Supprt
                 Key: BIT-1480
                 URL: https://bro-tracker.atlassian.net/browse/BIT-1480
             Project: Bro Issue Tracker
          Issue Type: New Feature
          Components: Bro
    Affects Versions: 2.3
         Environment: Using vCenter virtual switch, frames from monitored VMs are encapsulated using GRE and forwarded to my sensor on a different broadcast domain.
            Reporter: Matthew Domko
         Attachments: erspan

PCAP attached... Basically, bro recieves the erspan packet and doesn't recognize that it is just GRE with a slightly different format. All the packets get logged in bro with the ERSPAN source/dest addresses instead of the actual source/dest addresses. It seems like everything else is working. 

There was a discussion about this on a mailing list in the past, but no one provided PCAP.
http://mailman.icsi.berkeley.edu/pipermail/bro/2015-April/008347.html

And someone else released a tool to do the decapsulation on the side:
http://staff.washington.edu/corey/gulp/



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