Does VyOS supports DMZ failover servers with built-in commands, or it have to be done via cron, ping at timed intervals, and shell script ?
First (main) server running in DMZ (DNS, e-mail, web, squid transparent proxy, ftp) have IP 192.168.1.2
Backup (failover) - 192.168.1.3
All DNS requests from internal network, or from outside, must be redirected with DNAT to one of server listed above.
DNS requests from router itself - to DNS of our provider.
2 links from 2 providers, 1 active and another failover backup (no load balancing).
Currently running Shorewall, but planning to switch to VyOS due to limitations of first.
Thanks in advance for any suggestion(s).