How To Build A Mobile Testing / LAB Network Environment

lab network
Over the years I’ve had to showcase many technologies in live testing / lab demo scenarios. To avoid risk of dealing with unknown elements, I try to own responsibility for as much of the testing environment as possible. A simple way to remove the unknown network out of the equation is using a router or firewall to mimic a standard user using PAT (port address translation) and handling everything on the inside test network.

The concept for the lab network is pretty simple and can scale to many technology categories since most demos need a network. For example, it’s a lot sexier security demo showcasing a user accessing the web rather than permitting and denying pings. The configuration concepts are found below with explanation.

Demo Diagram

On a router or firewall, request DHCP like any standard user
interface FastEthernet0/0
ip address dhcp
ip nat outside
On the inside interface, NAT
interface FastEthernet0/1
ip address
ip nat inside

Route all traffic to the NAT interface
ip route

Overload the NAT
ip nat inside source list 1 interface FastEthernet0/0 overload

access list to overload traffic through
access-list 1 permit

On the Switch, create a vlan for your technology you are testing
interface Vlan2
description Whatever you are testing
ip address

Make everything default and route it to the firewall/router
ip default-gateway
ip route

One trick from my demo playbook. Enjoy

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