Docs/OPNsense

For Layer 1 network details, see Docs/Cables.

For Layer 2 network details, see Docs/Switches.

OPNsense is our router/firewall.

We have two OPNsense devices, Lasagna and Ravioli.

The VLAN configuration (like VLAN IDs) should probably be moved to Docs/Switches to keep this article strictly Layer3

Network

Management (OOB)

Subnet
10.10.0.0/24

OOB Management services like Dell iDRAC / HP iLO and internal networking hardware.

Management cannot communicate with LAN/WAN.

Generally, Management should be restricted from everything else.

OOB services tend to be super vulnerable, there are dozens of premade scripts that instapwn iDRACs and give you a root shell by just pointing them at the IP address.

Because of this, the iDRAC web login interface should only be accessible to anyone you're okay having root on the server.

LAN

Subnet
10.10.1.0/24

Servers and Virtual Machines.

LAN cannot communicate with Management.

WAN

Subnet
141.219.80.64/27

Our public IP subnet under Tech's 141.219.0.0/16 block.

The plan is to use reverse-NAT to map the public IPs to select internal IPs, since we won't have enough IPs for every VM.

OpenVPN

Subnet
10.10.10.0/24

Wireguard

Subnet
10.10.11.0/24

10.10.11.0/25 - Wireguard admin range (access to LAN+Management)

10.10.11.128/25 - Wireguard user range (access to only LAN)

All members can be freely given 'user' wireguard configs. Only admin configs need to be restricted (due to the aforementioned iDrac exploit issues).

Neither wireguard config should have access to the internet.

OPNSense