楼主这里可以参考下面的步骤的:
ASA 5510密码恢复:
1.重启防火墙出现
Use BREAK or ESC to interrupt boot.
Use SPACE to begin boot immediately.
2.进入rommon模式,然后修改寄存器
rommon #1> confreg
Current Configuration Register: 0x00000001-------------当前asa的寄存器值
Configuration Summary:
boot default image from Flash
Do you wish to change this configuration? y/n [n]: y---------------是否改变现有配置
enable boot to ROMMON prompt? y/n [n]: y
select specific Flash image index? y/n [n]: n
disable system configuration? y/n [n]: y --------重要----------是否关闭系统当前的配置
go to ROMMON prompt if netboot fails? y/n [n]: y
enable passing NVRAM file specs in auto-boot mode? y/n [n]: y
disable display of BREAK or ESC key prompt during auto-boot? y/n [n]: n
Current Configuration Register: 0x00102040---------------------修改后的寄存器值
Configuration Summary:
boot ROMMON
ignore system configuration
load ROMMON if netboot fails
pass NVRAM file specs in auto-bootloader mode