After clicking the Password button the following page is available.
In this section we can configure the access control account information.
Username: Enter the new login username for this router here. The default
username is Admin.
Old Password: Enter the old login password for this router here. The default
password is Admin.
New Password: Enter the new login password for this router here.
Confirm Password: Enter the new login password for this router here again.
Click the Apply/Save button to accept the changes made.
Click the Cancel button to discard the changes made and return to the main page.
Web User Interface Configuration
D-Link DSL-G256DG VDSL Router User Manual
Page 154