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
$226.79
1U BareMetal pfsense opnsense Router Firewall DNS Server 6x 10GB Ethernet Ports
$149.00
Cisco ASA 5516-X Adaptive Security Firewall Appliance Network Device
$249.99
Cisco Meraki Z3 VPN Firewall - Black
$15.00
Palo Alto PA-220 Next Generation Firewall Appliance w/ Power Adapter and Cord
$62.99
Fortinet Fortigate-60E Network Security Firewall FG-60E Power Cord
$59.00
Cisco Meraki MX84 Cloud Managed Security Firewall Appliance UNCLAIMED MX84-HW
$39.99
Cisco ASA5506-K9 ASA 5506-X Network Security Firewall
$40.00
WatchGuard Firebox M200 ML3AE8 Firewall Network Security Appliance
$25.00
SONICWALL 1RK23-07C REMOTE ACCESS FIREWALL
$67.00