What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Oracle Connection and Data Guard



Hellom PRTG

I have added the sensor for the Oracle database. When I set In the host the database credentials for database user SYS, then it works. When I want to use SYS AS SYSDBA as database user, I get this error in the PRTG sensor:

ORA-01017: invalid username/password; logon denied

How can I connect as user SYS AS SYSDBA to the database ? It's essential in case of the Oracle Data Guard disaster recvovery setup to connect as the highest privileged user. Because on the standby side, database user SYSTEM does not have these permissions.

Regards, Martin

credentials oracle sensor

Created on Nov 20, 2017 7:03:47 AM

1 Reply



Hello Martin,

Please enable "Write result to disk" in the sensor's "Settings" tab. With the next scan it will write one or several result-files into "C:\ProgramData\Paessler\PRTG Network Monitor\Logs (Sensors)" of your PRTG server (or on the Remote Probe if applicable). All files have the sensor's numeric ID in their filenames. The sensor ID can be found on the sensor's "Overview" tab. Please send us those result-files. Note: In case you've configured a different data-path in PRTG Administration Tool, you need to look there for subfolder "Logs (Sensors)".

Kind regards,


Created on Nov 20, 2017 1:24:25 PM by  Erhard Mikulik [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.