[H-GEN] Network statistic software

[Troy Piggins]

Hi.  I have a RH9 gateway/firewall for a small LAN.  This last
month our Bigpond usage has gone through the roof ( ie more than the
3Gb limit, when we had been surviving on 1Gb for about a year).  As
far as I know, nothing has changed network-wise, and I want to know
if it is someone deciding to download heaps of stuff, or where all
that data usage is going.

Last month was also up on usage, but I had installed WinXP SP2 on
all machines, and it wasn't until half finished before I woke up to
the fact that I could've done the admin SP download only once
instead of the 250Mb (or whatever) per machine. (I am not a real
admin :-) )

Anyway, what (free) tools can I use to monitor where the internet
traffic is going to internally.  That is, my gateway is running
iptables with port forwarding.  I want to know what IP the data from
the internal network interface is going.

Can this be done from iptables directly, or I have heard of netstat,
and mrtg, but haven't really used them.  Is there something else?

-- 
T R O Y  P I G G I N S
e : troy at piggo.com