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Physical interfaces

Physical interfaces are the hardware ports of the gateway (for example igc0, igc1, em0).

Where: Connectivity > Interfaces & network > Interfaces & network tab, edit icon on the row.

Configuring a port

Field Meaning
Description A label such as WAN, LAN or DMZ
Addressing Static or DHCP (automatic)
Addresses Static addresses in CIDR notation, e.g. 10.0.1.1/24. + Add address adds another
MTU Maximum transmission unit

With DHCP (automatic) the port requests its address from the upstream network. The row shows Waiting for lease… until it gets one, then Address obtained via DHCP.

Link state is reported by the device and updates live when a cable is plugged or unplugged.

Removing an interface

Deleting an interface does not on its own delete what refers to it. Before deleting, the portal lists every firewall rule, NAT rule, route, profile and bridge that names the interface, and offers:

  • Delete interface and rules — removes the interface and the firewall, NAT and route entries that name it
  • Delete interface only — leaves those entries in place

Profiles and bridges are named but not removed: edit those directly, so the rest of what they own stays consistent.

Leftover rules fail silently

A firewall rule on a deleted interface never matches, a route through it is never installed, and an outbound NAT rule for its subnet translates nothing. The network behind a missing NAT rule still hands out addresses and simply has no internet. Changing an interface's subnet has the same effect on NAT rules written for the old one.