General Knoppix support for those who've read the FAQ at the Wiki
Palo Alto PA-220 Next Generation Firewall Appliance w/ Power Adapter and Cord
$62.99
Fortinet Fortigate FG-61E Firewall Network Security Appliance ATP Bundle 1 years
$263.99
Firewall pfSense 2.7.2 Release 8GB Memory - Dual NIC 1 GB - 120GB SSD
$99.77
Palo Alto PA-220 Next-Gen Firewall
$49.95
Cisco Meraki MX64-HW Cloud Managed Firewall **UNCLAIMED
$25.00
Palo Alto PA-220 Next-Gen Firewall 750-000128-00A w/ Power adapter
$62.00
Cisco ASA5506-K9 ASA 5506-X Network Security Firewall
$40.00
Cisco Meraki MX84 Cloud Managed Security Firewall Appliance UNCLAIMED MX84-HW
$39.99
Fortinet Fortiwifi 60D FG-60D Security Appliance Firewall / VPN w/ AC Adapter
$34.97
Firewall pfSense 2.7.2 HP T730 AMD 427BB - 8GB Ram 5 ports GB NIC 32 SSD
$159.00