Monday, July 30, 2018

how to hack into a cisco 2960 switch without using a password



Bypassing (recovering) a cisco router or switch password is pretty easy to do.




















Here is how it can be done:

  • First, we need to reboot the router/switch and interrupt the boot sequence by hitting CRTL+BREAK key. After doing this, we will enter something that is called a ROM monitor mode
  • Next, we need to change the configuration register to turn on the bit 6 with the value “0x2142”. The bit 6 is turned off by default. Its default value is “0x2102”.

To turn the bit 6 on, let’s issue the following command :  confreg 0x2142

  • After turning the bit 6 on, we need to reset the device by issuing  this command : reset
  • Because no startup configuration is loaded at this point, the router will ask you if you want to use setup mode, answer no
  • Next, hit Enter to enter user mode
  • Next, type enable and hit Enter to go into privileged mode

Note: Notice here that you have not been prompted for a password when entering the privileged mode

  • Next, we need to save our new configuration by typing this command: copy startup-config running-config

Note: At this point you can feel free to set a new password.

  • Finally, we need to change the configuration register back to the default one by turning off the bit 6 . To do so, type these following commands:

config t

config-register 0x2102

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