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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