If you are going to purchase one and plan on using it for security-testing you will need to purchase an adapter that supports "packet injection". Use google search to determine if it is supported by a particular model.
Note that this function is not required for "normal" use, only for decrypting wifi passwords or other security testing.
If you are building a self-contained unit like the example in the images you may choose to permenently fix your router to the device. For this we recommend using Krazy Glue and applying it to the "rubber feet" of the router, then placing it somewhere accessible. Do not glue your router to the device if your "reset" button is on the bottom of the router or you do not plan to leave it there, it will likely leave a mess if removed.
It is not necessary to install an auxiliary switch although it is a nice touch for a self-contained unit as it allows you to power the router from the PC's power-supply and turn it on/off without turning off the POC.
If you choose to include an aux switch you should prepare placement of the switch before assembling your PC to avoid having to install it when all the components are in there - it can be tricky with clutter.
You may have to drill a hole in the case so be careful not to hit any components. For information on wiring the aux switch go to the section titled Hard-wiring the Router.
There really isn't anything complicated or extraordinary about assembling a POC, it's exactly the same as a regular PC. The trick to making it work is the way the networking components are wired together and configured.
Again, in this example we are going to be using a wireless connection to establish internet access and it will be shared with the router through the network / ethernet port.
Complete the following steps in sequence to prepare the hardware :
- Assemble a complete PC running Windows XP (see 'Required Components' section for more info).
- Disconnect any power from the PC.
- Install the wireless and network adapters if not already present.
- Plug in / Turn on the router.
- Reset the router using the factory "reset" button (small and located on back or bottom of router).
- Disconnect power from the router.
- Mount router on the prefered area of your PC (optional).
- Connect either end of the CAT5 cable to the ethernet port on the PC and the other end to any of the LAN ports on the router (there are likely 4 of them, not including the WAN port).
- Connect power to the router.
- Reconnect power to the PC.
So far, this is just a regular PC connected to a router - nothing special (except the router may be mounted to it and / or hardwired into the PC's power-supply, and also that there is no active internet connection going to the WAN port of the router).
This is really it for hardware assembly, you can add an additional network / ethernet port if you want to have support for a wired internet connection (like if you wanted to use it as a wired VPN bridge).
After configuring the router and network settings on the PC, you will switch the CAT5 cable that you just connected to the router from it's current LAN port to the WAN port.
We are currently using the LAN port so that we can configure the router.
After everything has been configured the CAT5 cable will then be used to share the network connection with the WAN port of the router.