On Fri, Mar 30, 2007 at 09:26:28AM -0700, Tom Eastep wrote:
> Asim Ahmed Khan wrote:
> > Hi,
> >  
> > I am using shorewall 3.0.5  on Fedora Core 4. Is that possible that i
> > can capture / monitor traffic usage (internet usage) from any particular
> > IP and if required i can block his traffic based on condition ? any help
> > greatly appriciated.
> 
> From http://www.shorewall.net/Introduction.html:
> 
>       Shorewall is not a daemon. Once Shorewall has configured Netfilter,     
>       it's job is complete and there is no ?Shorewall process? left
>       running in your system.
> 
> It follows that Shorewall itself cannot monitor anything.
> 
> If you have an external application that monitors traffic and decides that
> it wants to block traffic from a particular address, it can do so by using
> the "shorewall drop" or "shorewall reject" commands.

Although if you're just blocking an IP address entirely, and you're
doing a lot of them (few hundred or more), it's far more efficient to
use a null route (netfilter itself is quite slow compared to the
routing table).

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