General Knoppix support for those who've read the FAQ at the Wiki
G31-6L-11449NP-12 i226 TigerLake i3-1115G4 Soft VPN Firewall Linux/Win PC Bundle
$239.99
Palo Alto PA-220 Next Generation Firewall Appliance w/ Power Adapter and Cord
$62.99
Fortinet FortiGate 60F | 10 Gbps Firewall Network Security EXPIRED (FG-60F)- New
$226.79
Palo Alto PA-220 Next-Gen Firewall
$49.95
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
JUNIPER NETWORKS SRX300 SERVICES GATEWAY FIREWALL - WORKS - NO A/C ADAPTER -
$65.00
Firewall pfSense 2.7.2 Release 8GB Memory - Dual NIC 1 GB - 120GB SSD
$99.77
Fortinet Fortigate FG-61E Firewall Network Security Appliance ATP Bundle 1 years
$263.99