Believe it or not pix is kind of hard to figure out the syntax from the IOS help. I had to do some searching on Google. and found this. very easy (write erase – confirm; reload – confirm done!) startup-config gone.Ready for the new config.
pix# sh ver
Cisco PIX Firewall Version 6.3(5)
Cisco PIX Device Manager Version 3.0(4)
Compiled on Thu 04-Aug-05 21:40 by morlee
pix up 20 mins 24 secs
Hardware: PIX-501, 16 MB RAM, CPU Am5x86 133 MHz
Flash E28F640J3 @ 0x3000000, 8MB
BIOS Flash E28F640J3 @ 0xfffd8000, 128KB
0: ethernet0: address is 0015.6340.566a, irq 9
1: ethernet1: address is 0015.6340.566c, irq 10
Maximum Physical Interfaces: 2
Maximum Interfaces: 2
Cut-through Proxy: Enabled
Inside Hosts: 10
IKE peers: 10
This PIX has a Restricted (R) license.
Serial Number: 809361535 (0x303de07f)
Running Activation Key: 0x804a549d 0xd2471a4e 0x054ebfaa 0xfbf836aa
Configuration has not been modified since last system restart.
pix# write erase
Erase PIX configuration in flash memory? [confirm]
Type help or ‘?’ for a list of available commands.
Proceed with reload? [confirm]