General Knoppix support for those who've read the FAQ at the Wiki
FORTINET FORTIGATE 40F Next GEN Firewall Network Security EXPIRED (FG-40F)- New
$199.99
Fortinet FortiGate 60F | 10 Gbps Firewall Network Security EXPIRED (FG-60F)- New
$279.99
Fortinet Fortiwifi 60D FG-60D Security Appliance Firewall / VPN w/ AC Adapter
$34.97
Fortinet Fortigate 61E FG-61E Network Security/Firewall Appliance
$99.00
WatchGuard FireBox T35 Network Security Firewall Appliance with A/C Adapter
$33.33
Palo Alto PA-220 Next-Gen Firewall 750-000128-00A w/ Power adapter
$64.99
Cisco ASA 5505 v09 Series Adaptive Security Appliance Firewall
$19.99
Custom Built pfSense 2.7.2 Firewall/Router 10zig 5800q Dual-Core 2GHz/4GB/16GB
$89.00
Firewall pfSense 2.7.2 HP T730 AMD 427BB - 8GB Ram 4 ports GB NIC 12 SSD
$109.77
SonicWall TZ270 Network Security/Firewall, 8 Port, 02-SSC-2821 NON TRANSFERABLE
$160.99