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How to password break a ESW 520 switch while keeping the config

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Cisco 3750 web config


Yes, know more about the Cisco 3750, just visit: http://www.3anetwork.com/cisco-catalyst-3750-switches-price_c41

Dec 26, 2013 | Computers & Internet

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I forgot a password and i cant access a catalyst 2960 24-port 10/10


You can only reset password this way:
1.
Attach a terminal or PC with terminal emulation (for example, Hyper Terminal) to the console port of the switch.
Use the following terminal settings:
  • Bits per second (baud): 9600
  • Data bits: 8
  • Parity: None
  • Stop bits: 1
  • Flow Control: Xon/Xoff
2.Unplug the power cable.
3. Hold down the mode button located on the left side of the front panel, while you reconnect the power cable to the switch
4. Release the Mode button when the SYST LED blinks amber and then turns solid green. When you release the Mode button, the SYST LED blinks green.
5. switch: flash_init
6. switch: load_helper
7. switch: dir flash:
8. switch: rename flash:config.text flash:config.old
Rename config.text to config.old. In that file the password is stored.
9. switch: boot
10. Enter "n" at the prompt to abort the initial configuration dialog
11. Type en to enable
12. Switch#rename flash:config.old flash:config.text
13. Switch#copy flash:config.text system:running-config
14. Overwrite the current passwords:
conf term
enable secret <new pass>
enable password <new pass>
line vty 0 15
password <new pass>
login
line con 0
password <new pass>

15. write memory
16. copy run start

Sep 25, 2013 | Cisco Catalyst Computers & Internet

1 Answer

Need to break bios password on gx 520 desktop


open cabnet and next open harddisk and then appear cmos battery
remove it from motherboard wait for 3min

Mar 06, 2013 | Computers & Internet

2 Answers

I have forgotten my passwork to my wireless cisco linksys E3000, how do I go about retrieving it?


he WEP key is defined by the person who set your wireless router up. You will not be able to find out what the WEP key is, but you CAN change it if you have physical access to the router. If you are trying to connect to your wireless router and can't remember the WEP, then walk over to the router and on the back or bottom of it is a small little hole that you can fit a pen or paper clip into. Press the paper clip into the little hole for 10 seconds and release. This will reset all the settings on your router back to default and will allow you to access your wireless connection.

Note: doing this will take away all of your wireless security so make sure that you know what you're doing before messing with it!

Thanks and please rate if this helps you at all :).

Mar 29, 2011 | Cisco Linksys Refurbished E3000...

1 Answer

Hi i have 1841 router what is the default user name password for this i tryed with user name passowrd as cisco but is saying that no user cisco pls help me



  • Follow these steps in order to recover your password:
    1. Attach a terminal or PC with terminal emulation to the console port of the router.
      Use these terminal settings:
      • 9600 baud rate
      • No parity
      • 8 data bits
      • 1 stop bit
      • No flow control
    2. If you can access the router, type show version at the prompt, and record the configuration register setting.
      Note: The configuration register is usually set to 0x2102 or 0x102. If you can no longer access the router (because of a lost login or TACACS password), you can safely assume that your configuration register is set to 0x2102.
    3. Use the power switch in order to turn off the router, and then turn the router back on.
      Important Notes:
      • In order to simulate this step on a Cisco 6400, pull out and then plug in the Node Route Processor (NRP) or Node Switch Processor (NSP) card.
      • In order to simulate this step on a Cisco 6x00 with NI-2, pull out and then plug in the NI-2 card.
    4. Press Break on the terminal keyboard within 60 seconds of power up in order to put the router into ROMMON.
      If the break sequence does not work, refer to Standard Break Key Sequence Combinations During Password Recovery for other key combinations.
    5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.
      This step bypasses the startup configuration where the passwords are stored.
    6. Type reset at the rommon 2> prompt.
      The router reboots, but ignores the saved configuration.
    7. Type no after each setup question, or press Ctrl-C in order to skip the initial setup procedure.
    8. Type enable at the Router> prompt.
      You are in enable mode and should see the Router# prompt.
    9. Type configure memory or copy startup-config running-config in order to copy the nonvolatile RAM (NVRAM) into memory.
      Important: Do not type copy running-config startup-config or write. These commands erase your startup configuration.
    10. Type show running-config.
      The show running-config command shows the configuration of the router. In this configuration, the shutdown command appears under all interfaces, which indicates all interfaces are currently shut down. In addition, the passwords (enable password, enable secret, vty, console passwords) are in either an encrypted or unencrypted format. You can reuse unencrypted passwords. You must change encrypted passwords to a new password.
    11. Type configure terminal.
      The hostname(config)# prompt appears.
    12. Type enable secret password> in order to change the enable secret password. For example:
      hostname(config)#enable secret cisco
    13. Issue the no shutdown command on every interface that you use.
      If you issue a show ip interface brief command in privilege EXEC mode, every interface that you want to use should display up up. For example:
      Router#show ip interface brief
    14. Type config-register configuration_register_setting>. Where configuration_register_setting is either the value you recorded in step 2 or0x2102 . For example:
      hostname(config)#config-register 0x2102
    15. Press Ctrl-z or end in order to leave the configuration mode.
      The hostname# prompt appears.
    16. Type write memory or copy running-config startup-config in order to commit the changes.

Jul 02, 2010 | Cisco (1841) Router (cisco1841)

1 Answer

How do I reset the Privilege password on a 2600? The former IT Manager left without telling us what it is, and now we're screwed.


you need a reboot and a serial console I'm afraid. Lots of places on Cisco that detail the password recovery process, it's quite complex so I'm not going to go into detail, but you need to be physically in the same room connected with a serial console cable (9600 baud) for it to work. Basically, use break to interrupt the startup, change the config register to ignore startup config, reboot , go to enable mode, copy run start, enter config mode and reset the password.

Mar 26, 2010 | Paradyne BitStorm 2600 (2611-a1-430)

1 Answer

Password Recovery for Cisco Catalyst 4506


Please see Cisco's page at http://www.cisco.com/en/US/products/hw/routers/ps5199/products_password_recovery09186a0080093e12.shtml
for step by step details and more in depth instruction.

1. Reboot
2. Press the "break" button on your keyboard within 60 seconds of the power-up to put the router into ROMMON mode.
3. confreg 0x2142
4. reset
5. type, "no" when prompted to enter the initial configuration dialog.
6. enable
7. copy startup-config running-config
8. conf t
9. enable secret <password>
11. config-register 0x2102
12. reboot again

Jan 20, 2010 | Cisco Catalyst 4506-E Cat4500 E-series...

2 Answers

I had forgotten the password of my Cisco Catalyst 3550 Switch


password recovery procedure 3550 catalyst cisco switch
1>Attach a terminal or PC with terminal emulation (for example, Hyper Terminal) to the console port of the switch. Use the following terminal settings: ¨ Bits per second (baud): 9600 ¨ Data bits: 8 ¨ Parity: None ¨ Stop bits: 1 2>Unplug the power cable. 3>Power the switch and bring it to the switch: prompt 4>Issue the flash_init command 5>Issue the load_helper command. switch: load_helper switch: 6>Issue the dir flash: command. Note: Make sure to type a colon ":" after the dir flash.
7>Type rename flash:config.text flash:config.old to rename the configuration file. 8>Issue the boot command to boot the system. switch: boot Loading "flash:c3500xl−c3h2s−mz.120−5.WC7.bin"...############################### ################################################################################ ###################################################################### 9>Enter "n" at the prompt to abort the initial configuration dialog. −−− System Configuration Dialog −−− At any point you may enter a question mark '?' for help. Use ctrl−c to abort configuration dialog at any prompt. Default settings are in square brackets '[]'. Continue with configuration dialog? [yes/no]: n !−−− Type "n" for no. Press RETURN to get started. !−−− Press Return or Enter. Switch> !−−− The Switch> prompt is displayed. 10>At the switch prompt, type en to enter enable mode. Switch>en Switch# 11>Type rename flash:config.old flash:config.text to rename the configuration file with its original name. Switch#rename flash:config.old flash:config.text Destination filename [config.text] !−−− Press Return or Enter. Switch# 11. Copy the configuration file into memory. Switch#Type rename flash:config.old flash:config.text to rename the configuration file with its original name. Switch#rename flash:config.old flash:config.text Destination filename [config.text] !−−− Press Return or Enter. Switch# 11. Copy the configuration file into memory. Switch#copy flash:config.text system:running−config Destination filename [running−config]? !−−− Press Return or Enter. 1131 bytes copied in 0.760 secs Sw1# The configuration file is now reloaded.
Destination filename [running−config]? !−−− Press Return or Enter. 1131 bytes copied in 0.760 secs Sw1# The configuration file is now reloaded. 12>Overwrite the current passwords that you do not know. Choose a strong password with at least one capital letter, one number, and one special character. Note: Overwrite the passwords which are necessary. You need not overwrite all of the mentioned passwords. Sw1# conf t !−−− To overwrite existing secret password Sw1(config)#enable secret <new_secret_password> 13>!−−− To overwrite existing enable password Sw1(config)#enable password <new_enable_password> !−−− To overwrite existing vty password Sw1(config)#line vty 0 15 Sw1(config−line)#password <new_vty_password> Sw1(config−line)#login !−−− To overwrite existing console password Sw1(config−line)#line con 0 Sw1(config−line)#password <new_console_password> Write the running configuration to the configuration file with the write memory command. Sw1#write memory Building configuration... [OK]

Mar 24, 2009 | Cisco Catalyst 3550-24 24-Port Ethernet...

1 Answer

Catalyst ws-c2926 password recovery problem


  1. Attach a terminal or PC with terminal emulation to the console port of the switch. Use the following terminal settings:
    9600 baud rate
    No parity
    8 data bits
    No stop bit

  2. Unplug the power cable.
  3. Hold down the mode button while reconnecting the power cord to the switch. You can release the mode button a second or two after the LED above port 1x is no longer illuminated.
    The following instructions appear:
    The system has been interrupted prior to initializing the flash file system.
    The following commands will initialize the flash file system, and finish loading
    the operating system software:

    flash_init
    load_helper
    boot
  4. Type flash_init.
  5. Type load_helper.
  6. Type dir flash:. The switch file system is displayed:
    Directory of flash:
    2 -rwx 843947 Mar 01 1993 00:02:18 C2900XL-h-mz-112.8-SA
    4 drwx 3776 Mar 01 1993 01:23:24 html
    66 -rwx 130 Jan 01 1970 00:01:19 env_vars
    68 -rwx 1296 Mar 01 1993 06:55:51 config.text
    1728000 bytes total (456704 bytes free)
  7. Type rename flash:config.text flash:config.old to rename the configuration file. This file contains the password definition.
  8. Type boot to boot the system.
  9. Enter N at the prompt to start the Setup program, Continue with the configuration dialog? [yes/no] : N
  10. At the switch prompt type en to turn on enable mode.
  11. Type rename flash:config.old flash:config.text to rename the configuration file with its original name.
  12. Copy the configuration file into memory: Switch# copy flash:config.text system:running-config
    Source filename [config.text]? (press Return)
    Destination filename [running-config]? (press Return)
    The configuration file is now reloaded.
  13. Change the password: switch#configure terminal
    switch(config)#enable password Cisco
    switch#control/Z
  14. Write the running configuration to the configuration file:
    switch(config)#write memory

Jun 07, 2008 | Cisco Catalyst 2926 (WS-C2926) Networking...

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