What is the Configuration Utility User name and password?
This is article that is only for the ECB2500C which is an end-of-life and end-of-support device
The username and password are both "admin". If "admin" does not work in both the username and password fields. Then you can try to put "admin" in the username field and leave the password field empty, and then just press enter.
The ECB2500C is an end-of-life and end-of-support device. If you are still having issues trying to access the GUI of the ECB2500C, you can try to reset it to its defaults.
If that does not work, we would recommend you replace it, as we are no longer creating any firmware upgrades for this device and have not for some time now.