Restricting access during Multi-Wan failover
I am looking into adding an LTE router as a multi-wan setup for failover purposes. Basically I would want the LTE WAN to do nothing (or as little as possible) unless the main WAN goes down. Then I would want it to switch over.
The problem I have is that I would only want some "mission critical" systems on the LAN to be able to communicate out while it is failed over to the LTE WAN, so as not to use all of my data and run up a large bill. Basically I would want to firewall off everything except a few devices.
I don't have any experience with multi-wan, but in a single WAN setup I would normally limit internal outbound traffic on the LAN firewall, but don't know how to do this or if it is possible only when failed over to the backup WAN.
Any help is much appreciated.
You should use firewall rules to separate the traffic of mission critical devices and set the fail-over group as gateway, while the gateway rule for all other lan hosts will be your wan1.