5V0-41.21 VMware NSX-T Data Center 3.1 Security Questions and Answers

NSX provides a feature called Guest Introspection that allows administrators to provide security services to virtual machines, including antivirus protection. One of the components of Guest Introspection is the Guest Introspection Thin Agent, which must be deployed to provide Linux-based VMs with antivirus protection. The Thin Agent is a lightweight agent that runs inside the guest operating system of virtual machines and communicates with the NSX Manager to provide security services.

Once the Guest Introspection Thin Agent is deployed, the administrator can configure the antivirus service to scan virtual machines for malware and take action on any threats that are detected.

References:

• VMware NSX Guest Introspection documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/com.vmware.nsxt.guest_introspection.doc/GUID-A86FBAF1-A8D9-4E12-8F3D-04B3D89B8F7E.html
• VMware NSX Guest Introspection Thin Agent documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/com.vmware.nsxt.guest_introspection.doc/GUID-A86FBAF1-A8D9-4E12-8F3D-04B3D89B8F7E.html

The two Guest OS drivers that are required for the Identity Firewall to operate are NSX Network Introspection and Guest Introspection. NSX Network Introspection provides network-level visibility and control, while Guest Introspection provides kernel-level visibility and control. The other drivers listed, vmxnet3, NSX File Introspection, and e1000e, are not required for the Identity Firewall to operate.

In order to apply the rules, the vNIC of the virtual machine must be connected to an NSX managed segment. The NSX managed segment is a logical representation of the virtual network, and all rules are applied at this level.

For more information on NSX Distributed Firewall and how to configure it, please refer to the NSX-T Data Center documentation: https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.0/nsx-t-3.0-firewall/GUID-B6B835F2-B6F2-4468-8F8E-6F7B9B9D6E91.html

To use URL Analysis, you will need to have a Tier-1 gateway and a Layer 7 DNS firewall rule on the NSX Edge cluster. Additionally, you will need to configure an OFW rule allowing traffic OUT to the Internet. Lastly, a medium-sized edge node (or higher), or a physical form factor edge is also required as the URL Analysis service will run on the edge node. For more information, please see this VMware Documentation article[1], which explains how to configure URL Analysis on NSX.

[1] https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/nsxt_31_url_analysis/GUID-46BC65F3-7A45-4A9F-B444-E4A1A7E0AC4A.html

NSX Gateway Firewall is a distributed firewall that provides security for east-west traffic within a virtual environment.

B. Firewall rules in Pre Rule category are applied to all gateways. This category contains system-defined rules that are always applied first to all gateways and cannot be modified. These rules include the default deny all rule and others that control basic connectivity.

D. Security Groups can be used in Applied-To column. Security groups allow you to group together VMs that have similar security requirements and then apply firewall policies to those groups. This way you can apply the same security rules to multiple VMs at once, instead of configuring the rules on each individual VM.

References:

• VMware NSX-T Data Center documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/index.html
• VMware NSX-T Data Center Gateway Firewall documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/com.vmware.nsxt.firewall.doc/GUID-4C5D5A5F-8FDF-4F2A-9C5A-2C1903A3E5A5.html