怎么破解cisco路由器的密码?互联网规模的不断扩大以及各种大数据量业务的出现对路由器分组处理能力的要求大大提高。路由器不再是简单的转发报文，还需要在处理过程中考虑服务质量、流量整型、预测和防止网络拥塞等问题。下面就由小编来给大家说说怎么破解cisco路由器的密码吧，欢迎大家前来阅读!

怎么破解cisco路由器的密码

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#