CISCO防火墙破译密码及升级

一、ASA防火墙破译密码:


(1)准备环境:PCCOM口,连设备CONSOLE口,打开超级终端,参数还原默认值:端口速率9600b/s,数据位:8,无奇偶校验,然后启动ASA


(2)等待出现:

use baeak or esc to interrrupt boot.

use space to begin boot immediately.

按ESC键进入rommon状态:

rommon #0>

输入:

rommon #0>confreg 0x41(绕过NVRAM启动)

出现

update config register(0x41)in nvram...

rommon #1>reload

启动成功后,进入asa以后:

ciscoasa>enable

密码为空:

ciscoasa#sh run

ciscoasa#copy startup-config running-config

        #config terminal

设置新密码:

        #enable password benet(密码)

修改回原来的配置寄存器值:

asa(config)#config-register 0x11(从NVRAM启动)

保存配置文件

asa(config)#copy running-config startup-config


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二、IOS升级

(1)确保PC机能够telnet到ASA

(2)在PC机上运行Cisco TFTP Server(IP:192.168.0.100),将asa802-k8.bin放到相应的目录

(3)备份现有的文件

asa#copy run tftp://192.168.0.100/running-config

asa#copy start tftp://192.168.0.100/startup-config

asa#copy flash:/asa723-k8.bin tftp://192.168.0.100/asa723-k8.bin

(4)升级

asa#copy tftp://192.168.0.100/asa802-k8.bin flash:/asa802-k8.bin

adress or name of remoter host(192.168.0.100):回车

source filename[asa802-k8.bin]?回车

Destination filename[asa802-k8.bin]?回车

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

asa#dir

asa(config)#boot system disk0:/asa802-k8.bin

asa#copy run start

asa#reload

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