In this article I will configure reflexive ACL. This technique is described during CCNA4 Exploration, and I'm using it during the lab exercises.
About Reflexive ACL (IP session filtering)
Description from the cisco web, regarding IOS 15.1.
Running ASA 8.02K8 inside of the gns3 on win 7 professsional 32bit caused, that console is hanging and did not answer, stay clear.