[Gllug] Data transfer monitoring

[Luke Hopkins]

Morning all,

We have a small public network of 8 IP's, mixed OS's which run through a
router out into the ether.
Our provider won't allow us to monitor SNMP on the router, so its
proving quite difficult to monitor which boxes are transferring what.

What I'd like to do, is put a Linux router in between the Cisco and the
switch into which all the public boxes are connected; the idea being
that this would record which IP's are transferring what.

The problem I have is that I don't really 'get' how this Linux router
would be addressed, I understand port forwarding from public to private
etc, but I don't want that restriction, for example all of the boxes may
run a webserver, I guess it needs to be completely transparent.

Should I set the Linux router to a free IP address, make sure its
routing, then set the gateway of each of the other boxes to it? Like I
say, ideally it would be completely transparent so I'd rather not have
to change settings on the other boxes.

I'm not afraid of writing some perl etc so interpret the data, its more
a case of aquiring the data in the first place.

Any thoughts?

Thanks
Luke


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