How to Turn Your Raspberry Pi into a Wireless Hotspot
When hacking into a network during a penetration test, it can sometimes be useful to create your own wireless AP simply by plugging a Pi into an available Ethernet port. With this setup, you have your own backdoor wireless connection to the network in a matter of seconds. Creating an AP is also helpful while traveling, or needing to share a connection with a group of people. There are many reasons you might want to turn your Raspberry Pi into a hotspot. A simple use case is having your own cheap DIY travel router to use in hotel rooms while you're on the road, or even on campus to have a... more
from Null Byte « WonderHowTo full article here