各路由器密码找回方法_路由器各种连接的方法

2020-02-27 其他范文下载本文

各路由器密码找回方法由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“路由器各种连接的方法”。

各路由器密码找回方法

适用于所有的2000系列、2500系列、3000系列，以680x0为基准的4000系列，在ROM中运行10.0或更高版本的IOS以后的7000系列，在ROM中运行9.1或更高版本的软件的IGS系列。

这里假定您的路由器的名字为 “router”。

------

1、将一台终端或将PC以终端仿真的方式连到路由器的CONSOLE口上。

2、启动路由器到 “router>”状态下，键入 “show version”命令，此时记录下该命令的输出信息中的configration register的值（改值通常在该命令输出的最后一行），这个值通常应为0x2102或0x102。例如：configration register is 0x2102。

3、将路由器的电源关掉，然后又重新开启。

4、在路由器启动后的60秒内请在终端上键入中断键（Break键或Ctrl_C键），您会看到一个前面没有路由器名字的>大于号）提示符。如果没有出现，说明您没有给出正确的Break信号，在这种情况下，请您检查终端仿真的设置。

5、在>号提示符下键入 “o/r0x42”以便从Flash启动，注意第一个字母 “o”不是十进制数 “0”

6、在>号提示符下键入 “i”，路由器便会忽视存储的配置文件进行重新启动。

7、路由器启动后，对所有的setup的问题回答 “no”。

8、在router> 提示符下键入 “enable”，您就不需要口令就进入到enable模式，并且看到router# 提示符。

9、有两种方法可以改变enable口令： a.删除所有的配置，键入 “write erase”。

b.不删除所有的配置，只删除enable的口令

①.在router# 提示符下键入 “config mem”。

②.在router# 提示符下键入 “write term”。

③.在router# 提示符下键入 “config term”，出现提示符router（config）#。

④.在router（config）#提示符下键入 “enable secret xxxxxx”，其中 “xxxxxx”为您想所设定的口令。

⑤.键入 “Ctrl_z”或 “exit”，退出到router# 状态下。

⑥.在router# 提示符下键入 “write mem”。

10、在router# 提示符下键入 “config term，进入到router（config）# 提示符下。

11、在route（config）# 提示符下键入 “config-register 0x2102”，或者您在第二步所记录下来的值。

12、在router（config）# 提示符下键入 “Ctrl_z”或 “exit”，退出到router# 状态下。

13、在router# 提示符下键入 “write mem”（这一步也可省略）。

14、在router# 提示符下键入 “reload”。

15、在问您是否确认重新启动，键入回车键即可。

Cisco 2500系列的口令恢复 Cisco的系列访问服务器（Acce Server）由于其稳定的性能在人民银行金融网络中使用十分普遍。由于网络设备相对而言价格昂贵，使得一般人很少有机会像操作PC一样，可以经常使用和练习，因此当出现一些问题时很难解决。下面是一个Cisco 2509访问服务器口令丢失，导致无法进行参数恢复处理的例子。本文通过剖析Cisco 2500系列访问服务器的内存模式、配置管理，并以Cisco 2509为例给出口令恢复的方法。1.口令类别 Cisco路由器包含以下几种类别的口令：

有效密码口令（enabled secret paword）：是一种安全级别最高的加密口令，适用于CiscoIOS10.3(2)以后的版本，在路由器的配置表中以密码的形式出现。

有效口令（enabled paword）：安全级别次高的非加密口令。当有效密码口令没设置时，使用该口令。

终端口令（console paword）：用于防止非法或未授权用户修改路由器配置，在用户通过主控终端对路由器进行设置时，使用该口令。2.口令恢复原理

Cisco路由器保存了几种不同的配置参数，并存放在不同的内存模块中，介绍如下： •内部内存种类

Cisco2500系列路由器有几种类别的内存：ROM、闪存（flash memory）、不可变RAM（NVRAM）、RAM和包共享内存等五种。作用如下：内存类别作用

ROM 存放系统的引导程序

闪存存放Cisco IOS的镜像

NVRAM 存放配置文件（即startup-config）

RAM 存放当前系统使用配置

包共享内存进出包缓冲区

•配置文件及相关存放内存

•操作环境（PA3）及对应的配置登记码路由器的正常启动，应依次引导以下程序：

口令恢复的关键在于对配置登记码进行修改，从而让路由器从不同的内存中调用不同的参数表进行启动。有效口令存放在NVRAM中，因此修改口令的实质是将登记码进行修改，从而让路由器跳过NVRAM中的配置表，直接进入ROM模式，然后对有效口令和终端口令进行修改或者重新设置有效加密口令（因为有效加密口令为加密乱码，无法进行恢复，只可以改写），完成后再将登记码恢复。3.口令恢复步骤

将Cisco2509的主控口连接到PC机的串口上（如COM 1）；

启动Win95/98的超级终端，并配置为9600波特率、8个数据位、无奇偶校验、2位停止位；

用show version命令查看登记码；

如果中断屏蔽（即登记码的第4位为1），则重启路由器，并在开机后60秒内按Break键；如果中断未屏蔽，则发送中断；

执行以下命令，将登记码设置为0x042，使路由器跳过NVRAM模式，从ROM模式启动；

>o/r 0x042 进行初始化；

路由器重启，并将登记码设为0x142；

当提示是否进入对话配置时，回答“否”，出现；

Pre RETURN to get started!按回车，进入ROM模式：

Router >

键入enable命令进入EXEC状态，并键入命令configure memory，将NVRAM模式中的参数表装入内存；

键入configureter minal命令进行配置；从配置表中找出忘记的有效口令（或改写），并重新改写有效密码口令； Router ＃ configure terminal

将登记码还原为0x2102（即从闪存正常启动，并屏蔽中断）。

 [i=s] 本帖最后由 xuexiaoning 于 2008-12-23 15:37 编辑

Cisco路由器口令的恢复(1020)

Description

This document describes how to recover a paword on a Cisco 1020 router.Since the Cisco 1020 router is often not physically secured, to perform a paword recovery you must call Cisco Systems or your distribution channel and provide a Cisco 1020 router generated challenge.Using the override program, the support representative can provide a one-time paword you can use to enter enable mode.Notes:

Overrides can be done only from the console.Pre Return at the paword prompt if the enable paword is not set.Step-by-Step Procedure

1.From the console, log in to the Cisco 1020 router with username enable and paword override.The 1020 prints a challenge.2.Provide the support representative with the challenge.The challenge is used to provide the response.3.On the 1020 console, log in with username enable and use the response as the paword.You're now in enable mode.4.Type wr t to see the existing paword or type conf t to change the paword.Cisco路由器口令的恢复(7000)

Description

This document describes the paword recovery procedure for the Cisco 7000.Step-by-Step Procedure

Use the show version command to determine if the proceor in your router is an RP or an RSP7000.If the proceor is an RP, use the paword recovery procedure for the Cisco 2500.If the proceor is an RSP7000, use the paword recovery procedure for the Cisco 1600.Sample Output of a show version Command on a 7000 With an RP Module

Router#sh vers

Cisco Internetwork Operating System Software

IOS(tm)7000 Software(C7000-JS-M), Version 11.2(21), RELEASE SOFTWARE(fc1)

Image text-base: 0x00001000, data-base: 0x008F86E8

ROM: System Bootstrap, Version 11.2(3), SOFTWARE

ROM: 7000 Software(C7000-AJSV-M), Version 11.2(3), RELEASE SOFTWARE(fc2)

Router uptime is 1 hour, 38 minutes

System restarted by power-on at 15:19:36 MEST Tue Apr 25 2000

System image file is “c7000-js-mz_112-21.bin”, booted via tftp from 172.17.240.250

cisco RP1(68040)proceor(revision C0)with 65536K bytes of memory.Proceor board ID 0025A50A

G.703/E1 software, Version 1.0.SuperLAT software copyright 1990 by Meridian Technology Corp).Bridging software.X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.TN3270 Emulation software.Switch Proceor EIP controller(6 Ethernet).TRIP controller(4 Token Ring).AIP controller(1 ATM).Ethernet/IEEE 802.3 interface(s)Token Ring/IEEE 802.5 interface(s)ATM network interface(s)

128K bytes of non-volatile configuration memory.4096K bytes of flash memory sized on embedded flash.Configuration register is 0x2102

Sample Output of a show version Command on a 7000 With an RSP7000 Module

Router#sh vers

Cisco Internetwork Operating System Software

IOS(tm)RSP Software(RSP-DSV-M), Version 12.0(8.0.1)T, MAINTENANCE

INTERIM SOFTWARE

Image text-base: 0x60010908, data-base: 0x61090000

ROM: System Bootstrap, Version 5.3(9)[mkamson 9], RELEASE SOFTWARE(fc2)

BOOTFLASH: RSP Software(RSP-BOOT-M), Version 12.0(3), RELEASE SOFTWARE

(fc1)

Router uptime is 5 days, 10 minutes

System returned to ROM by reload at 14:17:10 MEST Tue Apr 18 2000

System image file is “ cisco RSP7000(R4700)proceor with 65536K/2072K bytes of memory.R4700 CPU at 100Mhz, Implementation 33, Rev 1.0

Last reset from power-on

G.703/E1 software, Version 1.0.G.703/JT2 software, Version 1.0.X.25 software, Version 3.0.0.Bridging software.EIP controller(4 Ethernet).FSIP controller(8 Serial).Ethernet/IEEE 802.3 interface(s)Serial network interface(s)

125K bytes of non-volatile configuration memory.16384K bytes of Flash PCMCIA card at slot 0(Sector size 128K).8192K bytes of Flash internal SIMM(Sector size 256K).Configuration register is 0x2102  Cisco路由器口令的恢复(cs500)

Description This document describes how to recover a paword on a Cisco cs500 communication server.The Cisco cs500 does not have a console port so to recover a paword you must erase the configuration then configure the server again.Step-by-Step Procedure

1.Unplug the Cisco cs500 server.2.Pre and hold the DEFAULT button on the front of the chais.3.Turn on the server.The OK and LAN LEDs blink on and off.4.When the OK and LAN LEDs blink off(after about 15 seconds), release the DEFAULT button.The 500-CS enters setup mode in about two to ten minutes.5.Configure the server.Cisco路由器口令的恢复(800)

Description

This document describes the paword recovery procedure for the Cisco 800.Step-by-Step Procedure

Attach a terminal or PC with terminal emulation to the console port of the router.Use the following terminal settings:

9600 baud rate

No parity data bits stop bit

The required console cable specifications are described in Cabling Guide for RJ-45 Console and AUX Ports(Cisco's 1000 series, 2500 series, and AS5100).Type show version and record the setting of the configuration register.Click here to see output of a show version command.The configuration register setting is usually 0x2102 or 0x102.Using the switch, turn off the router and then turn it on.Pre Break on the terminal keyboard within 60 seconds of the powerup to put the router into ROMMON.If the break sequence doesn't work, see Poible Key Combinations for Break Sequence During Paword Recovery for other key combinations.Type set ios-conf = 142 at the boot# prompt.If Flash is intact, the best setting is 0x42.If the Flash is not installed or is erased, use the 0x41 setting.Note that with this setting you can view or erase the configuration but cannot change the paword.Type boot at the boot#> prompt to initialize the router.The router reboots but ignores its saved configuration.Type no after each setup question or pre Ctrl-C to skip the initial setup procedure.Type enable at the Router> prompt.You'll be in enable mode and see the Router# prompt.Important Type config mem or copy start running to copy the nonvolatile RAM(NVRAM)into memory.Do not type config term.Type wr term or show running.The show running and wr term commands show the configuration of the router.In this configuration you see under all the interfaces the shutdown command, which means all interfaces are currently shutdown.Also, you can see the pawords either in encrypted or unencrypted format.Type config term and make the changes.The prompt is now hostname(config)#.Type enable secret.Iue the no shutdown command on every interface that is used.If you iue a show ip interface brief command, every interface that you want to use should be ”up up“.Type config-register 0x2102, or the value you recorded in step 2.Pre Ctrl-z to leave the configuration mode.The prompt is now hostname#.16.Type write mem or copy running startup to commit the changes.Router>show version

Cisco Internetwork Operating System Software

IOS(tm)C800 Software

(C800-Y6-MW), Version 12.1(1), RELEASE SOFTWARE(fc1)

Image text-base: 0x000EA000, data-base: 0x005D3000

ROM: TinyROM version 1.0(3)

Router uptime is 2 days, 3 hours, 8 minutes

System returned to ROM by power-on

System image file is ”flash:c800-y6-mw.121-1“

Cisco C801(MPC850)proceor(revision 0)with 51428K bytes of virtual memory.Proceor board ID JAD03050229

CPU part number 33

Bridging software.Basic Rate ISDN software, Version 1.1.Ethernet/IEEE 802.3 interface(s)ISDN Basic Rate interface(s)

12M bytes of physical memory(DRAM)

8K bytes of non-volatile configuration memory

8M bytes of flash on board(4M from flash card)

Configuration register is 0x2102

!---The router was just powercycled and during bootup a break sequence was sent to the router.TinyROM version 1.0(3)

Fri Apr 30 18:22:12 1999

boot# boot

Booting ”c800-y6-mw.121-1“...，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)C800 Software(C800-Y6-MW), Version

12.1(1), RELEASE SOFTWARE(fc1)

Image text-base: 0x000EA000, data-base: 0x005D3000

Cisco C801(MPC850)proceor(revision 0)with 51428K bytes of virtual memory.Proceor board ID JAD03050229

CPU part number 33

Bridging software.Basic Rate ISDN software, Version 1.1.Ethernet/IEEE 802.3 interface(s)ISDN Basic Rate interface(s)

12M bytes of physical memory(DRAM)

8K bytes of non-volatile configuration memory

8M bytes of flash on board(4M from flash card)

---System Configuration Dialog---

Would you like to enter the initial configuration dialog? [yes/no]: n Pre RETURN to get started!(pre Enter)

00:01:45: %SYS-5-RESTART: System restarted--

Cisco Internetwork Operating System Software

IOS(tm)C800 Software(C800-Y6-MW), Version 12.1(1), RELEASE SOFTWARE(fc1)

00:01:45: %LINK-5-CHANGED: Inte

rface BRI0, changed state to administratively down

00:01:45: %LINK-5-CHANGED: Interface Ethernet0, changed state to administratively down

00:01:46: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0, changed state to down

00:01:46: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to down

Router>en

Router#copy start run

Destination filename [running-config]?(pre Enter)

2010 bytes copied in 32.120 secs(62 bytes/sec)Router# Router#

00:02:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, changed state to down

00:02:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:2, changed state to down

Router#conf t

Enter configuration commands, one per line.End with CNTL/Z.Router(config)#enable secret cisco

Router(config)#

00:03:39: %SYS-5-CONFIG_I: Configured from console by console

Router#sh ip int brief

Interface IP-Addre OK? Method Status

Protocol

BRI0 unaigned YES TFTP administratively down down

BRI0:1 unaigned YES unset administratively down down

BRI0:2 unaigned YES unset administratively down down

Dialer0 unaigned YES TFTP up

Dialer1 192.168.32.1 YES TFTP up

Ethernet0 10.200.40.65 YES TFTP administratively down down

Router#conf t

Enter configuration commands, one per line.End with CNTL/Z.Router(config)#int e 0

Router(config-if)#no shut

Router(config-if)#

00:04:02: %LINK-3-UPDOWN: Interface Ethernet0, changed state to up

00:04:03: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed state to up

Router(config)#config-reg 0x2102

Router(config)#^Z Router#

00:04:36: %SYS-5-CONFIG_I: Configured from console by console

Router#write mem  Cisco路由器口令的恢复(700)

This document describes the procedure for performing paword recovery on Cisco 750/760 series routers using the NVRAM erase code(750erase.hex or 760erase.hex).Choose the appropriate Terminal Emulation Package(Windows95 and Windows3.1x instruction are included).Power cycle the router.While it is booting up, pre the ESC key a couple of times.This will put the unit into a software load mode.The unit will respond with the following prompts:

Ready to upload new firmware into flash.Baud(1=19.2K, 2=2400, 3=38.4K, 9=9600)?

Select the baud rate for the transfer(in this example 9600 is chosen).The unit will respond with the following prompt.Begin ascii upload at 8n1/9600 baud.Start the ascii file transfer of the image, 750erase.hex for the 750 series or 760erase.hex for the 760 series.These files are not interchangeable.This file must be treated as a text file for loading into the unit via the console port.At 9600, the transfer takes approximately 12 minutes.While the transfer is occuring, the LINE LED will be flashing rapidly.When the transfer is complete the unit will respond with the following prompts and then reboot itself:

Firmware transfer succeful.Now writing firmware into FLASH, standby...Firmware upload complete.Erase Version of 750/760 firmware This will erase all configured parameters

ERASING NVRAM...(reboots itself)

Ready to upload new firmware into flash.Baud(1=19.2K, 2=2400, 3=38.4K, 9=9600)? At this point, reload the original software repeating step 2.Procedure for performing a text/ascii transfer using Windows95 Hyperterminal

Choose Properties from the File Menu

Choose Settings Tab

Choose ASCII Setup Button

Make sure that both ”Line Delay“ and ”Character Delay“ are set to zero.Make sure that ”Send line ends with line feeds is check marked“.Click the OK Button on both screens.Close Hyperterminal and then restart it.Choose Send Text File...from the Transfer menu.Locate file(may have to change Files of Type to All Files)and highlight it.Click the OK Button.The file is now being transferred to the unit...there may not be any indication that the file is transferring except for the LINE LED on the front of the unit.While the transfer is occuring, the LINE LED will be flashing rapidly on the front of the unit.Procedure for performing a text/ascii transfer using Windows Terminal

Choose Text Transfers...from the Settings Menu.Make sure that ”Standard Flow Control“ is chosen.Click the OK Button.Choose Send Text File...from the Transfer Menu.Locate file(may have to change List Files of Type to All Files)and highlight it.Make sure that neither Append LF nor Strip LF are check marked.Click the OK Button.The file is now being transferred to the unit...there may not be any indication that the file is transferring except for the LINE LED on the front of the unit.While the transfer is occuring, the LINE LED will be flashing rapidly on the front of the unit.Cisco路由器口令的恢复(600)

The steps below describe how to recover a paword on the Cisco 600 series of routers.Step 1: Enter RMON mode.To do this, follow the steps below:

Connect your PC to the console port of the router.Set your Terminal Acce Program(such as HyperTerminal in Windows)to the following settings:

Baud rate: 38400 bps recommended(standard 9600 bps poible)

Data bits: 8

Parity: None

Stop bits: 1

Flow control: None

Power cycle the router(turn the router off, then on using the router's power switch)

As soon as you see the Hello!prompt, type Ctrl-C.You are now in RMON mode.Step 2: If you need to save the configuration file, execute the following command:

db fef80030 100

This command prints the configuration to the screen.The last number indicates the number of bytes to display.Use a value of 100 bytes or more for the number of bytes to display.Note: You must use the enable paword command for the paword to display encrypted during paword recovery.Step 3: Look for your encrypted paword.The text of the paword will be altered by two letters.For example, using the key a = c, b = d, c = e, and so on, the paword ”cisco“ would be ”agqam“.Step 4:(This step is optional.)Erase the current configuration.An example is shown below:

=>es 6

Erasing sector 00000006...Sector erased =>rb Hello!

CBOS v2.0.1.01

Note: This step reboots a Cisco 600 series router with no configuration.You will need to redo the configuration and then use the write command to save the changes to NVRAM.Step: 5: Reboot the router.An example is shown below:

rb  Cisco路由器口令的恢复(700)

Ready to upload new firmware into flash.Baud(1=19.2K, 2=2400, 3=38.4K, 9=9600)?

Firmware transfer succeful.Now writing firmware into FLASH, standby...Firmware upload complete.Erase Version of 750/760 firmware This will erase all configured parameters

ERASING NVRAM...(reboots itself)

Ready to upload new firmware into flash.Baud(1=19.2K, 2=2400, 3=38.4K, 9=9600)?

At this point, reload the original software repeating step 2.Procedure for performing a text/ascii transfer using Windows95 Hyperterminal

Choose Properties from the File Menu

Choose Settings Tab

Choose ASCII Setup Button

The steps below describe how to recover a paword on the Cisco 600 series of routers.Step 1: Enter RMON mode.To do this, follow the steps below:

Connect your PC to the console port of the router.Set your Terminal Acce Program(such as HyperTerminal in Windows)to the following settings:

Baud rate: 38400 bps recommended(standard 9600 bps poible)

Data bits: 8

Parity: None

Stop bits: 1

Flow control: None

Power cycle the router(turn the router off, then on using the router's power switch)

As soon as you see the Hello!prompt, type Ctrl-C.You are now in RMON mode.Step 2: If you need to save the configuration file, execute the following command:

db fef80030 100

This command prints the configuration to the screen.The last number indicates the number of bytes to display.Use a value of 100 bytes or more for the number of bytes to display.Note: You must use the enable paword command for the paword to display encrypted during paword recovery.Step 3: Look for your encrypted paword.The text of the paword will be altered by two letters.For example, using the key a = c, b = d, c = e, and so on, the paword ”cisco“ would be ”agqam".Step 4:(This step is optional.)Erase the current configuration.An example is shown below:

=>es 6

Erasing sector 00000006...Sector erased =>rb Hello!

CBOS v2.0.1.01

相关专题路由器各种连接的方法密码方法路由器各种连接的方法密码方法

[其他范文]相关推荐

[其他范文]热门文章