How to set up with just a single NIC?

[tphz (iptom)]

Perhaps it is possible…

Install IPFire on a box with single NIC using VLAN - Avinesh Singh

but not recommended

Use one NIC and VLANs

Hi, welcome to the IPFire community. Only speaking for myself, not for the entire bunch of core developers: Yes. For security reasons, you want at least to have the RED zone and internal ones (GREEN/BLUE/ORANGE) on different network interfaces, so a faulty VLAN configuration or vulnerable VLAN equipment cannot allow attackers to bypass your firewall completely. For internal networks with different security levels (such as GREEN and ORANGE), I personally see VLANs as an ugly, …

Regards