How To Create Ethernet RJ45 Loopback Adapter

By | 2011/08/03

I’ll show you how to create an ethernet loopback adapter!

A loopback adapter is useful for tricking a network card into believing it is plugged into a network.


Using two wires, connect:

1 to 3
2 to 6


The pin arrangement is 1-8 left to right, with the flat side facing you.

Here are some pictures to illustrate:

01_loopback 02_loopback

Cool!