Crack the router password, first of all should understand that the router start-up principle, we know that the router’s storage medium general by 5 components, they are ROM, flash memory (Flash Memory), can not change RAM (NVRAM), RAM and dynamic RAM (DRAM). When the router starts normally, the router first to run the self-test program ROM, the router hardware self-test, and guidance systems (minimum operating system, Mini OS).
Next, the router will run Flash in the IOS (Internetwork Operating System, Network Operating System), to find the router configuration in NVRAM and DRAM in its load. Note that, when the router load the minimum operating system, the operator immediately press “Ctrl” 10 “Break” button, you can stop the load IOS, enter the monitor debug mode.
In this mode, the user can change the translation view profile start position (By default, the router configuration stored in NVRAM, this configuration also contains the router’s password). Start by analyzing the principle of the router, you can learn, we can use this function into the monitor debug mode, skip loading the router configuration file contains the password, but directly into the router reset the router privileged mode password.
In addition, because the original router’s configuration file also contains many useful set of information, so change your password before, also with its initial configuration file should replace the current running configuration file. In the changes, then replace the currently running configuration file to the original starting configuration file. Finally finished setting, Ran to the router’s boot sequence back to normal boot sequence.
Through this setting, we can set the router’s password to your passwords, so as to solve because of forgotten passwords, but can not log on the router issue.