Sophos XG Firewall
WAF (webserver protection) Rule
Protected Servers
Selected hosts
Here you can add multiple IP/Servers. If multiple IPs are added will WAF perform loadbalance or failover?
it should perform round-robin (loadbalancing) and detect the server offline-status.
This isn't the XG Community - you will want to post future XG questions over there.
Cheers - Bob