The configuration of stake pool WEQNT is fully redundant. The relay nodes and their core node run on their own bare metal dedicated machines locally. Only the relay nodes are reachable via the internet. Both have their own firewall setup. The core node is totally isolated from the internet and communicates only with its local relay nodes.
The block producing node and its relay are running on two HP Proliant Microservers.
The HP Proliant Microservers are running on Ubuntu Server 20.04 LTS and are security hardened. All is made redundant to ensure WEQNT remains online 24/7, all year round.