On Fri, Feb 02, 2001 at 02:52:14PM +0000, Thomas Bridge mentioned:
> At 03:59 02/02/2001 +0000, Niall O Broin wrote:
> >Is there any Linux based level 4 switch software available à la Cisco local
> >directors - it strikes me from what someone mentioned the other day about
> >iptables and stateful firewalling that this is the kind of thing you need to
> >build a level 4 switch. Has anyone done anything like that yet ?
Well, there is rudimentary stuff out there. There is a BALANCE module for
iptables, that you can use instead of DNAT, for doing NAT to multiple
machines. But I don't think it can tell if machines are down, etc. It's a
patch separate to the main kernel, so it could still be alpha.
There is a VRRP implementation out there that works, but you can't really
do redundant filewalling till you can share arp & NAT structures between
the firewalls. Implementing this is being discussed at the moment, but no
working code is out :(
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