HCL-BF-PRO-10 Exam Dumps - HCLSoftware U Certified Professional-BigFix Platform 1

• BigFix Clients use UDP (User Datagram Protocol) to automatically find their closest relay based on network hops12.
• UDP is a connectionless protocol that does not guarantee reliable delivery of packets, but is faster and more efficient than TCP (Transmission Control Protocol)3.
• BigFix Clients send UDP packets to the BigFix Server and all the BigFix Relays in their subnet, and wait for responses12.
• The BigFix Server and the BigFix Relays reply with UDP packets containing their relay information and the number of hops to reach them12.
• The BigFix Client compares the responses and selects the relay with the lowest number of hops as its closest relay12.
• If the BigFix Client does not receive any response within a timeout period, it assumes that there is no relay in its subnet and falls back to the BigFix Server12. References:
• Automatically assigning relays to existing clients
• Configuring BigFix for automatic Relay selection Blog
• UDP (User Datagram Protocol)

• The license.pvk file is the private key file that is part of the BigFix license. It is protected by a password that is set during the installation of the BigFix server.
• The license.pvk file is used to authenticate the BigFix Master Operators, who are the highest level of authority in the BigFix hierarchy. They can perform any action on any computer or site in the BigFix deployment.
• The license.pvk file is also used to sign the masthead file, which contains the configuration settings and the public key for the BigFix deployment. The masthead file isdistributed to all BigFix components, such as clients, relays, and consoles, to verify the identity and authority of the BigFix server.
• The license.pvk file is not used to authenticate the BigFix Site Administrator, who is a special Master Operator that can manage the license and the masthead files. The Site Administrator uses the site admin password to access the license.pvk file and perform license-related tasks.
• The license.pvk file is not used to authenticate the BigFix local operators, who are the lower level of authority in the BigFix hierarchy. They can only perform actions on the computers and sites that are assigned to them by the Master Operators. The local operators use their username and password to log in to the BigFix console.
• The license.pvk file is not used to authenticate the BigFix LDAP operators, who are the local operators that are authenticated by an external LDAP server. They use their LDAP credentials to log in to the BigFix console. References:
• Managing licenses
• Missing or Lost license.pvk file
• Check private key password - license.pvk

• If UDP is not allowed on a network segment, the BigFix clients on that segment will not receive the UDP notifications from the server or relay, and will rely on the default 45-minute polling interval to check for new actions.1
• To reduce the delay in receiving new actions, you can enable the client polling feature, which allows the clients to poll the server or relay more frequently for new commands.2
• To enable the client polling feature, you need to set two client settings on the target clients:2
• You can set these client settings either through the console or manually on the endpoint.4
• After setting these client settings, the clients will poll the server or relay at the specified interval and receive new actions faster.

References:

• 1: https://help.hcltechsw.com/bigfix/9.5/platform/Platform/Installation/c_sample_proxy_configurations.html
• 2: https://help.hcltechsw.com/bigfix/9.5/platform/Platform/Config/r_client_set.html#_BESClient_Comm_CommandPollEnable
• 3: https://forum.bigfix.com/t/an-overview-on-the-client-evaluation-cycle/28056
• 4: https://help.hcltechsw.com/bigfix/9.5/platform/Platform/Config/r_client_set.html#Making_a_configuration_setting

• To create a Custom Site, you need to select Tools > Create Custom Site from the BigFix Console and enter a name for your site. You can also provide a description and a domain for your site.
• To assign permission levels to operators, you need to click the Operator Permissions tab from the site dialog and select the operators from the list. You can also grant read permission globally to all operators by clicking the corresponding button.
• The permission levels that can be assigned to operators are:
• The permission levels that cannot be assigned to operators are:
• Creating Custom Sites
• User Permissions and Guidelines
• Selecting Sites

• When an action is performed by the Master Operator, the action is saved in the Master Action Site, which is a special site that contains all the actions taken by the Master Operator.
• The Master Action Site is replicated to all the relays and clients in the deployment, so that they can receive and execute the actions from the Master Operator.
• The Master Action Site is also visible to all the operators in the console, but only the Master Operator can create, modify, or delete actions in this site.
• The Master Action Site is different from the Master Operator Site, which is a custom site that contains content created by the Master Operator, such as Fixlets, tasks, analyses, and baselines.
• The Master Operator Site is not replicated to the relays and clients, but it can be subscribed to by other operators or computers.
• The Master Operator Site is also different from the source site of a Fixlet, which is the site where the Fixlet was originally published by the content provider, such as HCL or a third-party vendor.
• The source site of a Fixlet is not affected by the actions taken by the Master Operator, unless the Master Operator modifies the Fixlet itself and republishes it to the same site or a different site.
• The Local Operator Site is a custom site that contains content created by a non-master operator, such as Fixlets, tasks, analyses, and baselines.
• The Local Operator Site is not replicated to the relays and clients, but it can be subscribed to by other operators or computers.
• The Local Operator Site is not affected by the actions taken by the Master Operator, unless the Master Operator modifies the content in the Local Operator Site and republishes it to the same site or a different site. References:
• Understanding sites
• Creating and managing actions
• Creating and managing custom sites

• The WebUI is a web-based interface that provides access to the flexibility and power of BigFix.
• The WebUI has some upper use limits that depend on many factors, such as the number of endpoints, the workload, the time of day, the server location, and the number of concurrent users.
• Concurrent users are defined as highly active users who perform multiple actions per minute on the WebUI.
• According to the BigFix Capacity Planning Guide, both the Windows and Linux WebUI instances support 36 concurrent users on a 250k deployment base. This is the recommended scalability limit for the WebUI server on BigFix v10.x.
• The WebUI also requires additional hardware resources, such as CPU, memory, and storage, to power the WebUI. These resources are in addition to the BigFix root server requirements and depend on the number of concurrent users.
• The WebUI also implements a database cache for several counters to improve the WebUI response times. The cache has a default refresh interval of 10 minutes. References:
• Hardware Requirements
• WebUI Administrators Guide
• BigFix WebUI

Here is a step by step comprehensive explanation of why this is the case:

• The Action Script you are testing is trying to stop, start, and execute a service using batch commands.
• The first line of the script uses the “appendfile” command to create a new file with the content “net stop myService”.
• The second line of the script uses the “move” command to rename the file created by “appendfile” to “c:\runme.bat”.
• The third line of the script uses the “waithidden” command to execute the file “c:\runme.bat” and wait for it to finish.
• The fourth line of the script uses the “appendfile” command again to create a new file with the content “net start myService”.
• The fifth line of the script uses the “move” command again to rename the file created by “appendfile” to “c:\runme.bat”.
• The sixth line of the script uses the “waithidden” command again to execute the file “c:\runme.bat” and wait for it to finish.
• The error occurs at the fifth line of the script because “appendfile” is trying to copy content to “c:\runme.bat” which already exists due to the previous actions in the script. In BigFix Action Script, “appendfile” is used to create a new file or append to an existing one, but it seems there’s an issue with overwriting or permissions that causes this line to fail.
• To fix this error, you can either delete the file “c:\runme.bat” before using “appendfile” again, or use a different file name for the second “appendfile” command.

Some references that support this explanation are:

• BigFix Action Script guide: 1
• BigFix Action Script reference: 2
• BigFix Action Script examples: 3
• BigFix Action Script best practices: 4

• The WebUI cache is used to improve the response time of the WebUI by storing and refreshing some data that requires complex calculations, such as the number of applicable devices or patches1.
• The cache refresh interval, also known as the cache Time To Live (TTL) value, determines how often the cached data is invalidated and updated1. The default value is 600 seconds (10 minutes)1.
• To change the cache refresh interval, you can use the client setting _WebUIAppEnv_CACHE_TTL and enter the desired interval in seconds1. The minimum value is 180 seconds (3 minutes)1.
• Increasing the cache refresh interval can reduce the impact on system resources, especially for large deployments and intensive patching activities1. However, it can also affect the freshness of the cached data1.
• Another setting that affects the WebUI caching is _WebUIAppEnv_CACHE_INTERVAL, which determines how often the WebUI checks for new data from the BigFix server1. The default value is 60 seconds1.
• Decreasing the cache interval can improve the responsiveness of the WebUI, but it can also increase the load on the BigFix server1. Therefore, you should balance the cache interval and the cache TTL values according to your needs and environment1.
• The other settings, _WebUIAppEnv_SP_QUEUE_CONCURRENT, _WebUIAppEnv_DATA_REFRESH_SECONDS, and _WebUIAppEnv_SITE_CACHE_SIZE, are not related to the WebUI cache refresh interval12.
• _WebUIAppEnv_SP_QUEUE_CONCURRENT limits the number of stored procedures that run simultaneously per app in the background that update cache values1. The default value is 51.
• _WebUIAppEnv_DATA_REFRESH_SECONDS determines how often the WebUI polls the BigFix server for new data2. The default value is 15 seconds2.
• _WebUIAppEnv_SITE_CACHE_SIZE specifies the maximum size of the site cache in megabytes2. The default value is 100 MB2.

References:

• Caching - HCL Product Documentation
• Server settings definitions - HCL Product Documentation