I have a sonicwall 240. they have been discontinued. can't find a 240 HA unit. can't afford a new 220 plus a 220 HA unit.
Is there a way to install another sonicwall (NSA 220, TZ model, etc.) into production with the 240 for a make-shift HA set up? Essentially, two firewalls set up with the same rules so if one goes down the other takes over, even if it is a manual failover by setting up a remote connection to each firewall and failing over as needed.