Issues relating to HDD Installs. Once you have installed Knoppix, it basicly becomes debian, so you should check out www.debian.org for information.
Cisco ASA5525-FTD-K9 Security Appliance with FirePower Services
$1000.00
Dell SonicWall TZ400 Firewall Appliance
$39.99
NetGate SG-2440 with pfSense Plus Console GNU Router Firewall Security Appliance
$69.99
Ubiquiti Networks USG Unifi Security Gateway Router/Firewall
$29.95
Fortinet Fortiwifi 60D FG-60D Security Appliance Firewall / VPN w/ AC Adapter
$34.97
OPNsense six-port Gigabit router/firewall on Lanner FW-7535 hardware
$69.00
Fortinet Fortigate-60E Network Security Firewall FG-60E White
$79.99
PFSense F80 Firewall | Atom C2358 CPU | 4 Gigabit Ports | 2GB RAM | Fresh Reload
$75.00
Fortinet Fortigate 500D FG-500D 8x 1GbE RJ45 + 8x 1GbE SFP Firewall Appliance
$99.99
Sophos XG 135 Network Security 7 Gbps Firewall throughput Desktop Appliance
$124.99