Cisco 4100/9300 FTD password recovery and reset to factory default

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Password Reset

First, here is how you reset the password, and then we can get in and reset the box back to factory default

1. Reboot
2. Use BREAK, ESC or CTRL+L to interrupt boot
3. Find the boot flash command and make a note of kickstart image and system image
4. Load the kickstart image, which is something like this: rommon 1 > boot bootflash:/installables/switch/fxos-k9-kickstart.5.0.3.N2.3.14.69.SPA
5. This will take you to the switch(boot)# prompt
6. Now you can change the password:

switch(boot)# config t
switch(boot)(config)# admin-password erase
Your password and configuration will be erased!
Do you want to continue? (y/n) [n] y

7. Exit to switch(boot)# prompt and load system image saved earlier to complete the procedure:
switch(boot)(config)# exit
switch(boot)# load bootflash:/installables/switch/fxos-k9-system.5.0.3.N2.3.14.69.SPA
8. Configure the device

Reset 4100/9300 to Factory Default

If you know the password and want to set the FTD box (4100/9330) back to factory default. (For 5500x/2100 reset, see blog post Easy FTD reset)

1. Login to your FXOS
2. Type connect local-mgmt
3. Type erase configuration

Example:
cisco4140-1# connect local-mgmt
cisco4140-1(local-mgmt)# erase configuration
All configurations will be erased and system will reboot. Are you sure? (yes/no):yes
Removing all the configuration. Please wait….
Configurations are cleaned up. Rebooting….

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