Originally Posted by Synomenon
I should probably Google how to "connect through telnet", but what exactly do those commands do?
Eh, just power cycle your router then, it will be simpler
If you don't know what telnet is, then you probably didn't enable telnet on your router, so you won't be able to use it.
Those commands would have erased the nvram settings that tells the router that someone is already logged in, and from which IP. The RT-N66U cannot allow more than one simultaneous user to be logged in, and if your IP changes before you log out, you will be locked out.