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至顶网网络频道简单的说一下 cisco路由器的密码破解

简单的说一下 cisco路由器的密码破解

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 破解密码原则 只删除密码不破坏配置

来源:中国IT实验室 2009年9月9日

关键字: 密码破解 路由器 CISCO

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  破解密码原则 只删除密码不破坏配置

  

  1 重启 路由器 按 ctrl + pause break 键 进入mini IOS

  2 修改寄存器值改变启动次序

  rommon 1 > confreg 0x2142

  3 在mini IOS下重启路由

  rommon 2 > reset

  System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

  Copyright (c) 2000 by cisco Systems, Inc.

  cisco 2621 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory

  Self decompressing the image :

  ########################################################################## [OK]

  Restricted Rights Legend

  Use, duplication, or disclosure by the Government is

  subject to restrictions as set forth in subparagraph

  (c) of the Commercial Computer Software - Restricted

  Rights clause at FAR sec. 52.227-19 and subparagraph

  (c) (1) (ii) of the Rights in Technical Data and Computer

  Software clause at DFARS sec. 252.227-7013.

  cisco Systems, Inc.

  170 West Tasman Drive

  San Jose, California 95134-1706

  Cisco Internetwork Operating System Software

  IOS (tm) C2600 Software (C2600-I-M), Version 12.2(28), RELEASE SOFTWARE (fc5)

  Technical Support: http://www.cisco.com/techsupport

  Copyright (c) 1986-2005 by cisco Systems, Inc.

  Compiled Wed 27-Apr-04 19:01 by miwang

  cisco 2621 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory

  .

  Processor board ID JAD05190MTZ (4292891495)

  M860 processor: part number 0, mask 49

  Bridging software.

  X.25 software, Version 3.0.0.

  2 FastEthernet/IEEE 802.3 interface(s)

  2 Low-speed serial(sync/async) network interface(s)

  32K bytes of non-volatile configuration memory.

  16384K bytes of processor board System flash (Read/Write)

  --- System Configuration Dialog ---

  Continue with configuration dialog? [yes/no]: n

  Press RETURN to get started!

  Router>

  看这里进入系统之后 直接就进入了用户模式 没要密码

  Router>en

  Router#copy start run

  Destination filename [running-config]?

  552 bytes copied in 0.416 secs (1326 bytes/sec)

  ru1#

  我们 输入enable 进入特权模式 输入命令 copy start run 从NVRAM 里面调用配置到内存中

  下一步更换密码

  ru1#conf t

  Enter configuration commands, one per line. End with CNTL/Z.

  ru1(config)#line console 0

  ru1(config-line)#pass admin

  ru1(config-line)#login

  ru1(config-line)#exit

  ru1(config)#line vty 0 4

  ru1(config-line)#pass admin

  ru1(config-line)#login

  ru1(config-line)#exit

  ru1(config)#enable pass admin

  ru1(config)#enable secret admin

  ru1(config)#service password-encryption

  比如说我们将密码修改为admin 实验环境下 只采用这一个密码

  下一步 更改寄存器值 恢复到正常的启动次序

  ru1(config)#config-register 0x2102

  下一步 保存配置到NVRAM里面

  ru1(config)#exit

  %SYS-5-CONFIG_I: Configured from console by console

  ru1#copy run start

  Destination filename [startup-config]?

  Building configuration...

  [OK]

  ru1#

  重启一下

  ru1#rel

  Proceed with reload? [confirm]

  %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload Command.

  System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

  Copyright (c) 2000 by cisco Systems, Inc.

  cisco 2621 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory

  Self decompressing the image :

  ########################################################################## [OK]

  Restricted Rights Legend

  Use, duplication, or disclosure by the Government is

  subject to restrictions as set forth in subparagraph

  (c) of the Commercial Computer Software - Restricted

  Rights clause at FAR sec. 52.227-19 and subparagraph

  (c) (1) (ii) of the Rights in Technical Data and Computer

  Software clause at DFARS sec. 252.227-7013.

  cisco Systems, Inc.

  170 West Tasman Drive

  San Jose, California 95134-1706

  Cisco Internetwork Operating System Software

  IOS (tm) C2600 Software (C2600-I-M), Version 12.2(28), RELEASE SOFTWARE (fc5)

  Technical Support: http://www.cisco.com/techsupport

  Copyright (c) 1986-2005 by cisco Systems, Inc.

  Compiled Wed 27-Apr-04 19:01 by miwang

  cisco 2621 (MPC860) processor (revision 0x200) with 60416K/5120K bytes of memory

  .

  Processor board ID JAD05190MTZ (4292891495)

  M860 processor: part number 0, mask 49

  Bridging software.

  X.25 software, Version 3.0.0.

  2 FastEthernet/IEEE 802.3 interface(s)

  2 Low-speed serial(sync/async) network interface(s)

  32K bytes of non-volatile configuration memory.

  16384K bytes of processor board System flash (Read/Write)

  %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

  %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

  %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up

  %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively down

  %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down

  %LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down

  Press RETURN to get started!

  User Access Verification

  Password:

  ru1>en

  Password:

  ru1#

  最后解释一下 文中带下划线的为个人说明

  阴影部分是必要的步骤 是要输入命令的

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