Cisco Asa Firewall Image For Vmware Workstation Today

interface gigabitethernet0/1 nameif inside security-level 100 ip address 192.168.1.1 255.255.255.0 no shutdown

The unlicensed ASA will work for 100 Kbps throughput and 2 VLANs – fine for basic lab.

To add a demo license (if you have a Cisco.com account):

activation-key <key1> <key2> <key3> <key4> <key5>

The fastest route is downloading a virtual appliance that is ready to run. Many educational repositories offer a .vmdk hard disk file paired with a .vmx configuration file.