Access is denied even though the username/password pair is correct
Some reasons for denial include the following parameters controlled by your TACACS+ server application:
The account has expired.
The access attempt is through a port that is not allowed for the account.
The time quota for the account has been exhausted.
The time credit for the account has expired.
The access attempt is outside of the time frame allowed for the account.
The allowed number of concurrent logins for the account has been exceeded.
For more help, see the documentation provided with your TACACS+ server application.