Updated May 8, 2026 Raff’s Firewall is a stateful, port-based filter that applies to a VM’s public network interface. It comes in two layers that always run together:Documentation Index
Fetch the complete documentation index at: https://docs.rafftechnologies.com/llms.txt
Use this file to discover all available pages before exploring further.
- Raff Default Firewall — system-managed, attached to every public interface automatically. Blocks five known dangerous ports (Windows file-sharing, MS-RPC, WinRM) and otherwise lets everything else inbound, all outbound. You don’t toggle it; it’s always on.
- Your Firewall Groups — custom rule sets you create and attach to specific VMs. Stack on top of the Default to allow or deny exactly the ports and source IPs you need.
Stateful — what it means for you. Because the firewall tracks connections, you only write rules for the direction the connection is initiated. Reply traffic on the same connection is automatically allowed.
- Allow inbound TCP/443 to your web server → return packets back to the client are handled automatically. You do not need an outbound rule for replies.
- Allow outbound TCP/443 from your VM (e.g. to call an external API) → the response from that API is automatically allowed back in. You do not need an inbound rule for replies.

What you can do
| Task | Where |
|---|---|
| See which ports the Default blocks | Networking → Firewall → View Rules on the Default card |
| Build a custom rule set | Networking → Firewall → + Create Firewall Group |
| Start from a known-good template | Create dialog → Start from template dropdown |
| Attach a group to a VM | VM detail → Network tab → IP card → Attach (or) group row’s ⋮ → Assign to VM |
| Edit rules in a live group | Group row’s ⋮ → Edit Rules (same dialog used for create — no separate view) |
| Delete a group | Group row’s ⋮ → Delete (must detach VMs first) |
Most viewed
Create a Firewall Group
Walk the create dialog with templates and rules.
Inbound vs outbound
The model — direction, protocols, port and IP formats.
Add rules
Port and source-IP formats explained.
Attach to a VM
Apply a group to one VM’s public IP.
Browse
Quickstart & guides
Create, add rules, attach, update, delete.
Concepts
Direction, stateful firewall, layers, templates.
Details
Limits, blocked ports, rule formats.
Troubleshooting
Common firewall issues.
API Reference
Firewall endpoints.
Changelog
All API updates and changes.