Hi Jon,
Thank you for your reply. There seems to be some mis-understanding here. I am looking for a tool wherein I can view download speeds of a particular user/ subnet. iftop does provide me that but writing the output to a file is almost difficult to understand.
My requirement is not to know what the users are communicating. Just the total download speed is what I am looking for, but for a particular user/ subnet. vmstat gives me the WAN link download speed, but it does not solve my purpose.
Thanks and regards, Shannon R
On Mon, Sep 24, 2012 at 9:38 PM, Jonathan Abbey jonabbey@arlut.utexas.eduwrote:
On Mon, 24 Sep 2012 10:51:08 -0500, Shannon Rodrigues wrote: | Hi Jon, | | Thank you for your reply. | In my typical setup, I want a tool which will display download rates of a | particular user/ subnet. I am configuring download limiting rules to user/ | subnet but unfortunately have no tool to verify whether the config is | working or not.
iftop doesn't know anything about what user is communicating, it just shows what ports and IP addresses are involved.
| Manually checking output of iftop is helpful, but I would like to push the | output to a file so that I could verify this at the end of the day. Getting | it listed by ports is not a necessity. Traffic to and from will solve my | purpose. | I would like the output of download rate of a user/ subnet to be written to | a file for lets say a 5 second interval.
Couldn't you use netstat (or ss, on more modern Linuxes) for that? Or tcpdump with some after the fact filtering?
iftop's claim to fame is real time curses-style graphing of traffic, there are plenty of tools for doing statistics gathering that would be more suitable for generating reports.
Jon
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Jonathan Abbey jonabbey@arlut.utexas.edu Applied Research Laboratories The University of Texas at Austin GPG Key: 71767586 at keyserver pgp.mit.edu, http://www.ganymeta.org/workkey.gpg