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Virginise the box

Always nice to start from a clean slate.  Do the following to remove any old configs on the firewall and start from factory defaults.

ASA1# write erase
Erase configuration in flash memory? [confirm]

ASA1# reload
System config has been modified. Save? [Y]es/[N]o:
Proceed with reload? [confirm]

[... blablabla ...]

Pre-configure Firewall now through interactive prompts [yes]? n

Type help or '?' for a list of available commands.