I'm not a networking guru and not using Cloudflare (for specific reasons). When I read the Cloudflared tunnel docs, this seems very similar to Tailscale Funnel: 
Could that work too for running a ZS server for my own use as I cannot open the RMTP 1975 port? I think there are many Tailscale users among us who might benefit from this feature.
Tailscale
Tailscale Funnel · Tailscale Docs
Securely route internet traffic to local services using Tailscale Funnel.
