Hello, we have a Sonicwall NSA3500 and 1 high speed connection to our main office and are thinking about adding an NSA4600 and bumping the speed on our primary connection. And adding another connection and using the 3500 as a failover. So being that we can't use Sonicwall's purchased failover plan because it requires 2 identical firewall's we are wondering what techniques we might have available to us. How about the internal Sonicwall failover or a 3rd party hardware failover device (have seen a few of these - any recommendations would be welcome). A hot failover technique would be preffered.
Thanks in advance for any help or ideas.