Have you tried security oriented distro Operator.iso by ussysadmin.org? It is based on knoppix and debian. Also it is one of the best network testing and pen testers tool?
Cisco ASA5525-FTD-K9 Security Appliance with FirePower Services
$1000.00
Fortinet FortiGate 60F | 10 Gbps Firewall Security Throughput (FG-60F)- Open Box
$381.99
Fortinet Fortiwifi 60D FG-60D Security Appliance Firewall / VPN w/ AC Adapter
$34.97
Ubiquiti Networks USG Unifi Security Gateway Router/Firewall
$29.95
SonicWall TZ300 Power Supply Wired Firewall Router Network Security Appliance
$14.50
Dell SonicWALL TZ300 | Firewall Security Appliance
$24.99
OPNsense six-port Gigabit router/firewall on Lanner FW-7535 hardware
$69.00
NetGate SG-2440 with pfSense Plus Console GNU Router Firewall Security Appliance
$69.99
Dell SonicWall TZ400 Firewall Appliance
$39.99
Sophos SG-115 Rev 2 UTM Firewall Security Appliance 4-Port w/Power Adapter
$65.00