My WiFi was being used by a neighbor (who had visited once and I had given the password). When I discovered he was continuing to do so, I tried accessing the router using the old passwords I had recorded but they all did not work.
Then I physically reset my DIR-825, but after that I was not able to login into the Admin account.
I tried:
Admin / (blank)
Admin / Admin
admin / (blank)
admin / admin
and previous passwords that I had for the account.
But the page at: http://192.168.0.1/wizard/index-wizard.html?redirect_id=2c363342050bdccb28189667a3089bf7#/info keeps showing:
"Wrong username/password or the session is expired"
I am able to connect to the internet through it though - the WiFi password is one which came by default from the ISP - a hex string.
But I cannot figure out the router password so I am unable to configure the name, see the logs, block the neighbor, etc...