1U Rackmount pfSense Gigabit Firewall + Router + VPN 8GB RAM 120GB SSD 6 Ports

PfSense/OPNsense 6x1Gb, Quad Core, 4GB, 128GB SSD, AES-NI, QAT (Lanner FW-7525D)

Sophos SG 115w Rev.3 Firewall/VPN Network Security Appliance

Check Point PB-20 Firewall Network Security Appliance w/ Power Cord

WatchGuard Firebox M370 Network Security Firewall Appliance 8-Port 1U Rack

Sophos SG 105 Network Security Firewall Appliance VPN Device

OPNsense six-port router / firewall on Check Point PB-10 hardware

Cisco ASA5525-X 8-Port Rack Mount Firewall Adaptive Security Appliance