On Mon, 20 May 2013, Phil Fagan wrote:
Just curious and perhaps off topic a tad but; is the stateful filtering of sessions on a router to replace a firewall? Or is there another reason to do it? I could see a benefit of creating blacklists, however, I'm struggling with what other benefits it would provide...service aware load-balancing? I'm very interested to learn what other strategies and or design considerations would be made with thinking of using filtering on a router.
I'm perfectly willing to accept consolidation of services :-)
Stateful firewalling is also painful in environments where path asymmetry could exist, since either the routing policy would need to be designed to enforce symmetry (more complex, less reliable), or the stateful firewalling devices would need to have a way to share state information with each other to accommodate asymmetry. jms