General Knoppix support for those who've read the FAQ at the Wiki
FORTINET FORTIGATE 40F Next GEN Firewall Security Unregistered (FG-40F)-Open Box
$199.99
Fortinet FortiGate 60F | 10 Gbps Firewall Network Security EXPIRED (FG-60F)- New
$251.99
Cisco FPR1010-NGFW-K9 FirePOWER Security Appliance **CISCO EXCESS**
$339.00
Palo Alto PA-220 Next-Gen Firewall 750-000128-00A w/ Power adapter
$68.00
Palo Alto PA-220 Next-Gen Firewall
$57.19
Dell SonicWALL TZ300 Firewall Appliance Transfer Ready - NO AC
$24.98
Protectli The Vault 4-Port Firewall Network Appliance FW108120 51524F17
$149.95
SimpleWAN SW Advanced 2 Firewall & Router- SW302DA-NA
$300.00
Fortinet Fortigate Fg-1000C 1000c Security Appliance FIREWALL Hub - Tested
$89.99
SONICWALL TZ270 Network Security Base Appliance Only (02-SSC-2821) - Open Box
$304.99