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Re: Need to record bandwidth used by branch office VPN tunnels
From: Sake Blok <sake () euronet nl>
Date: Fri, 9 Aug 2013 17:16:00 +0200

On 9 aug 2013, at 03:05, Laura Chappell wrote:

Consider using tshark (command-line tool) with the following parameters perhaps…
tshark –q –z io,stat,3000,ip.addr==,ip.addr==,ip.addr== > mystats.txt
No packets are saved during this process – you’re only getting statistics.

Laura, this is not entirely true. As tshark uses dumpcap to capture the traffic, dumpcap will save all the packets in a 
temporary file from which tshark will read. To monitor the traffic for  a week in this manner will most likely result 
in a) an out-of-memory error due to the fact that tshark keeps information about each conversation and b) a disk 
filling up with packet data.


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