You can run multiple Untangle's in parallel. Untangle uses VRRP (Virtual Redundancy Router Protocol) to handle all of the switching between the Untangle servers.
There are only a few requirements in order to run VRRP on Untangle successfully:
- All Untangle servers must be turned on in order to participate. This may sound obvious, but it must be noted.
- All Untangle servers must be configured with the same shared VRRP virtual address on each interface participating in the VRRP configuration. This means that you will need at least 3 IP's: 1 for each server, and the virtual IP to be shared between all devices. You will enter the virtual IP on each server under VRRP aliases.
- All participating Untangle interfaces must be configured statically. This means that the IPv4 configuration must be set to static.
- All participating Untangle interfaces must be addressed, no bridged interfaces. Parallel Untangles configured as bridges will create a bridge loop.