Both pfsense/opnsense are FreeBSD based which have some UEFI bugs making it hard to run on wyse 3040 which uses UEFI-only firmware. This was my experience.
However, I have tried IPFire (Linux based firewall) and it worked fine.
Though, there are some people who have used wyse 3040 as router -
I have used DietPi, Ubuntu Server, Proxmox, Debian as OS on it.
These are some of the good use cases for wyse 3040 -
- pihole (DNS ad-blocker)
- ipFire (Firewall)
- NAS file server used OMV myself and it works fine.
- Docker host for testing some apps.
- Proxmox Backup Server
- Proxmox Quorum Node
- Light Home Assistant usage
- Retro gaming (I have used Recalbox personally)
- VPN endpoint for remote access.
For more details refer to this Reddit thread on r/homelab subreddit - Dell Wyse 3040, what should I do with it? : r/homelab
Please DM me in case you have any queries