Sys Logon Settings

Variable NameMeaning
SYS_LOGONDbvisit Standby does not require an Oracle password as it uses OS authentication. 
These variables can be used to enable Dbvisit Standby to logon as sysdba WITH a username and password. This may be required when SQLNET.AUTHENTICATION_SERVICES = (NTS) cannot be set or a password file cannot be used.
SYS_LOGON turns this feature on and off.
Values are Yes or No
Default is No.
If you are not sure, set to No or leave blank.
Example: 
    SYS_LOGON = Yes
SYS_USERName of the user to logon to the database.
Is only affected if SYS_LOGON = Yes
If you are not sure leave blank.
Example:
    SYS_USER = sys
_SYS_PASSWDPassword of SYS_USER.
Is only affective if SYS_LOGON = Yes and SYS_USER is set.
Example:
    _SYS_PASSWD = not_tiger
Note: if ENCRYPT_PASSWDS = Yes, then the password will be encrypted in the DDC file as follows:
    _SYS_PASSWD = ENCRYPT8F87092545A76234
SYS_LOGON_STRINGThe logon string to the database. 
Is only affective if SYS_LOGON = Yes and SYS_USER is set.
Default is as sysdba
Example:
    SYS_LOGON_STRING = as sysdba