On Thu, Feb 5, 2015 at 4:10 PM, David Jansen <david@nines.nl> wrote:
Hi,
We have used dynamic routing on firewall in the old days. We did experience several severe outages due to this setup (OSPF en Cisco). As you will understand i’m not eager to go back to this solution but I am curious about your point of views.
Is it advisory to so these days?
Any specific firewall in mind? As this depends from vendor to vendor. I've had some issues with OSPF and CheckPoint firewalls when the firewalls would be overloaded and started dropping packets at the interface level causing adjacencies to go down, but I solved this by using BGP instead and the routing issues went away. On Juniper things tend work OK. Other than this, make sure you don't run into asymmetric routing as connections might get dropped because the firewall does not know about them or packets arrive out of order and the firewall cannot reassemble all of them.