You probably know that you can back up your router’s configuration; however, did you know that you might be able to recover passwords from this configuration file?
This is great if you have forgotten your router’s login password or the credentials for your ISP connection. To try it download and run the RouterPassView utility from NirSoft, and open your router’s config file. Any recoverable passwords will appear right away.
Remember, anyone else that gets ahold of your back up files can do the same, so keep them secure!