I have an old laptop i'll be running knoppix
I will be using it as a firewall. - iptables.
It only has one ethernet port, i'll be wanting more. The firewall i'd run in it would control the communication between the connected computers.
What USB multiple ethernet port adaptors, would work with knoppix?
Dell PowerEdge R630 Server 2x E5-2680 V4 = 28 Cores S130 32GB RAM NEW 480GB SSD
$197.99
Dell PowerEdge R630 Server 2x E5-2640v3 2.60Ghz 16-Core 64GB H330
$182.65
Dell Poweredge R630 Server 2x E5-2620 V4 =16 Cores | S130 | 32GB RAM | 2x trays
$159.99
Dell PowerEdge R620 Server 2x E5-2660 v2 2.2GHz 20 Cores 256GB RAM 1x 480GB SSD
$139.99
$100.00
Dell Poweredge R730xd 12 Bay LFF 2x SFF 2x E5-2680v3 2.5ghz H730p No Ram No HDD
$219.99
Dell PowerEdge R720xd 26HDD 300gb 2.5-inch E5-2697 X 2CPU 384RAM 7.2 Tb HDD 
$180.00
Dell R630 8 SFF Server 2x E5-2650 V4 2.2GHz = 24 Cores 64GB DDR4 SATA Only 1x PS
$243.20
Dell Poweredge R730xd LFF 14-Bay 2U Server | Choose Your CPU & RAM Config
$489.99
Dell Poweredge R420 3.5" 2x Xeon E5-2430 2.2ghz 12-Cores 24gb 2x 1TB 2x 550w
$169.99