The external indexer can be installed on the following 64-bit operating systems: Red Hat Enterprise Linux Server 6.7, Red Hat Enterprise Linux Server 7, CentOS 6.7, and CentOS 7. The installer is a self-contained package that includes every required dependency of the indexer.
Log in as root to the host that you want to use to index your audit trails.
Copy the installer package to the host.
Install the package using the package manager of the operating system. For example:
rpm -i external-indexer-standalone-<version-number>.x86_64.rpm
The installer performs the following steps automatically.
Unpacks the indexer files into the /opt/external-indexer/ directory.
Installs the related init scripts (the /etc/init.d/external-indexer init script, and adds the init script configuration to /etc/sysconfig/external-indexer).
Creates the indexer user and usergroup. This is an unprivileged user that is used to run the indexer application.
Registers the service to start automatically on system boot. Note that the indexer init script uses bind mount points.
Edit the firewall rules of the host to accept connections from SPS on the TCP/12345 port. For example:
iptables -A INPUT -p tcp --destination-port 12345 --jump ACCEPT
If there is a firewall between the indexer host and SPS, enable two-way communication between them on the TCP/12345 port.
Configure the indexer. For details, see Configuring the external indexer.
In order to connect to SPS and index the audit trails, you must configure the external indexer. Complete the following steps.
Unless you know exactly what you are doing, modify only the parameters you are instructed to.
Log in to the SPS web interface, and navigate to Basic Settings > Local Services > Indexer service.
Export the configuration file for the external indexer: click Export. (Note that the Export button is displayed only after the configuration to enable SPS to use remote indexers has been committed.)
The configuration file contains the listening address (IP and port) of SPS, the OCR license, and the necessary keys for SSL authentication.
Upload the file to the host of the external indexer.
On the external indexer host, import the configuration file with the following command:
Configure the external indexer service: open the /opt/external-indexer/etc/indexer/indexerworker.cfg configuration file for editing.
To edit the number of worker groups assigned to a certain worker process type, find the worker_groups line.
A worker group has the following parameters:
name: the name of the worker group
count: the number of workers to use for processing
capabilities: the type of job(s) this process will perform (index, screenshot, video, near-realtime)
Setting the near-realtime capability exclusively determines whether active or closed sessions will be indexed. Take the following examples:
A connection policy configured with near real-time priority (Connection policy > Enable indexing > Priority) requires that you also configure indexer workers that are capable of near real-time indexing. To configure such indexer workers, set the near-realtime capability for the relevant workers.
Indexer workers with the near-realtime capability require fewer CPU cores but more memory than indexer workers that do not have this capability.
Make sure that the sum value of the workers are equal to the number of CPU cores in the host (or the number of CPU cores minus one if you want to save resources for other tasks).
One Identity recommends using dedicated hosts for external indexing. If the host is not dedicated exclusively to the external indexer, decrease the number of workers accordingly.
Optional step: To fine-tune performance, you can configure the number of OCR threads each worker can initiate using the ocr_thread_count key.
The default setting is 3. When configuring this setting, pay attention to the available CPU cores, as raising the number of possible threads too high can impact performance negatively.
Optional step: If instructed by One Identity Support, configure the OCR engine.
Find the engine key, and change its value to one of the following options:
omnipage-external is the default setting. It provides the best performance and stability by allowing workers to initiate multiple OCR threads.
This setting also allows you to search for images where OCR could not be performed. On the search UI of SPS enter the OOCCRRCCRRAASSHH search string to list all such images. If possible, contact our Support Team, so we can continue improving the engine.
Note that multiple OCR threads can only speed up processing graphical protocols (RDP, VNC and ICA trails), and do not affect the processing speed for terminal-based protocols (telnet and SSH).
omnipage only supports one OCR thread per worker.
If you have to use this option, make sure to also set the ocr_thread_count to 0.
Save your changes. To continue with uploading decryption keys (for indexing encrypted audit trails), see Uploading decryption keys to the external indexer.
To start the indexer service, see Starting the external indexer.
If the audit trails you want to index are encrypted, complete the following steps to make the decryption keys available for the indexer.
Obtain the RSA private keys and the matching x.509 certificates in PKCS-1 PEM format, and copy them to the external indexer's host. Other certificate formats are not supported.
Use the indexer-keys-json utility to transform the certificate and the private key to the required JSON format. When executed, the script asks for the path to the certificate and the private key, and the password of the private key. After the conversion, the password is removed.
The utility automatically adds the certificate and the private key to the /opt/external-indexer/etc/indexer/indexer-certs.cfg keystore file. If you want to use a different keystore file, use the --keystore argument to specify another file. If the keystore already includes the certificate and the private key you want to add, they will be ignored.
In the /opt/external-indexer/usr/bin/ folder, issue the following command: indexer-keys-json
Enter the absolute path to the X.509 certificate. Alternatively, you can include this information as a parameter: indexer-keys-json --cert <path-to-certificate>
Provide the absolute path to the corresponding private key. Alternatively, you can include this information as a parameter: indexer-keys-json --private-key <path-to-private-key>
If the key is password protected, enter the password to the private key.
To add additional certificates, re-run the indexer-keys-json command.
You can now start the indexer service. For more information, see Starting the external indexer.
It is possible to use a hardware security module (HSM) or a smart card to store the decryption keys required for decrypting audit trails. An HSM or a smart card is a tamper-resistant physical, software, or cloud solution that can securely store digital keys used for authentication.
The main steps of configuring a hardware security module (HSM) or smart card to integrate with an external indexer are as follows:
To see examples of how to configure various HSM or smart card solutions that you wish to integrate with your external indexer(s), consult the following sections: