I have been playing with an ASA 5505 lately. I wanted the ability to start fresh when I could not figure things out. I came up with the following commands to cut and paste into the console, allowing me to “Start over”.
First I reset to factory default and set the internal subnet range
configure factory-default 192.168.123.1 255.255.255.0
You have to hit the space bar a couple of times, then paste in the next sections:
boot system disk0:/asa911-k8.bin interface Vlan2 ip address 126.96.36.199 255.255.255.0 route outside 0.0.0.0 0.0.0.0 188.8.131.52 dhcpd dns 184.108.40.206 dhcpd address 192.168.123.5-192.168.123.132 inside dhcpd enable inside ssh scopy enable ssh 192.168.123.0 255.255.255.0 inside ssh timeout 60 ssh version 2 console timeout 0 username myusername password 3ncrypt3dp4$$w0rd encrypted privilege 15 no call-home reporting anonymous !-- Optional - allow pings outbound policy-map global_policy class inspection_default inspect icmp exit exit !
This code above sets the external IP, enabled DHCP internally, enables ssh and scope, creates a user, and allows pings through.
I hope this might help someone.