5V0-41.21 Questions and Answers

East-West service insertion refers to the ability to insert security services, such as firewall and intrusion detection and prevention, between virtual machines (VMs) that are communicating within the same logical network.

One of the insertion points for East-West service insertion is the virtual network interface card (vNIC) of the guest VM. The vNIC is the virtual representation of a physical NIC on a VM, and it connects the VM to the virtual network. By inserting security services at the vNIC level, traffic between VMs can be inspected and secured before it reaches the virtual switch.

• VMware NSX-T Data Center documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/index.html
• VMware NSX-T Data Center Security documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/com.vmware.nsxt.security.doc/GUID-8F7C8B70-F1A6-4F31-8D6C-A0A9B9C9A9D3.html

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 configure NSX-T Security Groups inside a distributed firewall rule, the administrator would select the "Security" menu item in the NSX-T Manager user interface.

Within the Security menu, the administrator would navigate to the "Groups" option, where they can create, edit, and manage security groups. These groups can then be used in the "Applied To" column when creating or editing firewall rules.

In the Security menu, administrator can also configure other security features such as firewall, micro-segmentation, intrusion detection and prevention, and endpoint protection.

References:

• VMware NSX-T Data Center documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/index.html
• VMware NSX-T Data Center Security Groups documentation https://docs.vmware.com/en/VMware-NSX-T-Data-Center/3.1/com.vmware.nsxt.groups.doc/GUID-8C8DDC52-0B91-4E9F-8D8E-E1649D3C3BBD.html

For further reading, see the VMware NSX-T Data Center Administration Guide (https://pubs.vmware.com/NSX-T-Data-Center/index.html#com.vmware.nsxt.admin.doc/GUID-E6B25C6F-1F25-4B0F-B8AF-6B8C00F9C3A3.html)  for more information on configuring the Distributed IDS/IPS.

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