General Knoppix support for those who've read the FAQ at the Wiki
Fortinet FortiGate 60F | 10 Gbps Firewall Network Security EXPIRED (FG-60F)- New
$251.99
Fortinet Fortigate FG-61E Firewall Network Security Appliance ATP Bundle 1 years
$263.99
Fortinet FortiGate 200E VPN Firewall FortiGate200E FG-200E - MINT
$220.00
Palo Alto PA-220 Next-Gen Firewall 750-000128-00A w/ Power adapter
$68.00
USED: NETGEAR ProSafe FVS336G VPN Firewall
$25.00
Cisco ASA5506-K9 ASA 5506-X Network Security Firewall
$40.00
Cisco ASA 5505 Series ASA5505 Adaptive Firewall Security Appliance
$5.00
Cisco Meraki MX84 Cloud Managed Security Firewall Appliance UNCLAIMED MX84-HW
$39.99
Firewall pfSense 2.7.2 HP T730 AMD 427BB - 8GB Ram 5 ports GB NIC 32 SSD
$159.00
1U BareMetal pfsense opnsense Router Firewall DNS Server 6x 10GB Ethernet Ports
$149.00