Firewall rules that discriminate by connection duration

Vlad GALU vladgalu at gmail.com
Wed Nov 10 03:23:24 PST 2004


On Tue, 9 Nov 2004 20:10:30 -0700 (MST), Brett Glass <brett at lariat.org> wrote:
> I'm interested in crafting firewall rules that throttle connections
> that have lasted more than a certain amount of time. (Most such
> connections are P2P traffic, which should be given a lower priority
> than other connections and may constitute network abuse.) Alas, it
> doesn't appear that FreeBSD's IPFW can keep tabs on how long a
> connection has been established. Is there another firewall for
> FreeBSD that can?
>
  
   All firewalls in FreeBSD can, actually. It's part of the stateful
inspection feature. The only thing they lack is a match parameter
based on the timer.
 
> --Brett Glass
> 
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