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CNS-OIT and the ISO recommend a NetGate PFsense appliance. See https://www.netgate.com/products/appliances/. E.g.
- Small router (2-port) is ~$160 ~$180 (see https://store.netgate.com/pfSense/SG-1100.aspx)
- Medium router (4-port) is ~$350 ~$400 (https://store.netgate.com/SG-3100.aspx)
- Larger rounter (8-port) is ~$850 ~$900 (https://store.netgate.com/pfSense/XG-7100-desktop.aspx)
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