Most modern routers allow you to backup the configuration of the router into a file, and then restore the configuration from the file when it’s needed.
The backup file of the router usually contains important data like your ISP user name/password, the login password of the router, and wireless network keys.
If you lost one of these password/keys, but you still have a backup file of your router configuration, RouterPassView might help you to recover your lost password from your router file.
I can see this being very useful for recovering, as pointed out, your ISP password. Since you typically set this in your router and then forget about it, using this tool can save you a call (and the respective wait time) to your ISP’s tech support.
Not all routers are supported, but it seems the more popular models are covered. This is probably a one-time use utility but again, it can easily save you an hour in tech support calls.
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