Re: monitoring with iptables question

[Vladislav Kurz <vladislav.kurz@webstep.net>]

On Tuesday 23 of September 2008, Aleksej wrote:
> Thanks for the links, I'm reading it now, but there is a lot of
> information... My problem is that I don't know how much available bandwidth
> I have (this is about wireless networks). Otherwise I could just calculate
> the total throughput on the interface and see if there is some free
> bandwidth left. Can one with linux traffic control tools or iptables derive
> the load of interface/queue? The only thing I need to know is whether the
> output transmission queue can cope with all the traffic waiting for
> transmission, in other words, is the queue full loaded or not.

Maybe something like this would show what you are looking for:

tc -s qdisc show dev eth0

iptables count packets that hit certain rules, but tc counts packets that hit 
the outgouing queue on interface. That might help you. Anyway read lartc.org.

-- 
Regards
        Vladislav Kurz