Repository navigation
pfSense Dynamic Networks Alias — User Guide
Dynamic Networks Alias (Auto Alias) combines networks from multiple pfSense interfaces into a single, automatically maintained firewall alias.
This guide covers three basic operations: finding, creating, and managing dynamic network aliases.
Navigate to Firewall → Auto Alias.
The overview displays all configured dynamic network aliases.
Each entry shows:
| Column | Description |
|---|---|
| Alias Name | Name of the native pfSense alias |
| Address Family | Selected IPv4 and/or IPv6 address classes |
| Interfaces | Interfaces contributing networks |
| Edit | Modify an existing alias |
| Delete | Remove an existing alias |
Click Add to create a new alias.
Click Add on the overview page.
Enter a unique native pfSense alias name using letters, numbers, and underscores.
Example: internal_networks
Select the address classes to include:
- IPv4 networks
- IPv6 Global Unicast Address (GUA) networks
- IPv6 Unique Local Address (ULA) networks
The available selections allow supported combinations of these address families.
Select at least two interfaces whose networks should be combined.
Hold Ctrl (Linux/Windows) or Command (macOS) to select multiple interfaces.
For example, selecting LAN, OPT2, and OPT3 combines their matching networks into one alias.
Click Save to store the alias configuration.
The resulting native pfSense alias can be used in standard firewall rules.
Navigate to Firewall → Auto Alias.
Click the edit icon next to an existing alias.
Modify the address-family selection or included interfaces, then click Save.
Click the delete icon next to the alias you want to remove.
Before deleting an alias, verify that it is not referenced by existing firewall rules.
Use the overview page's Save button where required to persist changes.
Auto Alias automatically maintains network definitions when relevant interface addresses or prefixes change.
This is particularly useful for dynamic IPv6 Prefix Delegation, where static network aliases would otherwise require manual maintenance.
Important: Auto Alias manages network aliases, not firewall rules. Existing firewall policies remain under administrator control.
For installation, compatibility, release information, and technical details, visit the project repository.