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Network Security Best Practices  For NSX

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NSX is a sort of virtualization platform that use of virtual switches. It is used widely in data centers; expanding data center network into virtualized platform is main feature. Therefore operators prefer to use virtual switches in addition to physical switches. For both switches operator must manage multiple management interfaces.

Let's briefly explain role of virtualization practically; for a server virtualization platform the target is virtual switches while  physical switches use a network management system.

A virtual network management system (VNMS) consists of a server virtualization platform, duplicate network switches and  user clients. Here a question comes to mind.  How does the VNMS communicate? The answer is by the help of network management interface (NMI) and device mangement interface (DMI). A DMI is a setting between the VNMS and network devices. A NMI is a setting between the network application and the VNMS.
NSX-Structure.png                                                                     Figure: NSX Structure

In terms of security, the VNMS contains information about virtual network management. Virtual network management information carries administrative knowledge about data center. Access attacks may be prevented by the control of the connections between the NMI and the DMI. This specific region of the virtual management network system that is the heart of security of NSX .

The other parts of system physical and virtual nodes are used for configuration of the management. The other role of virtual NMS is in integrating existing management of multiple interfaces into a single interface. The VNMS manages device connectivity in the managed target network. Performing this task, it stores network management  information about configured virtual networks in the target network. As a briefly explained result is that security algorithm of NSX depends on multiple parameters such as NMI , DMI and VNMS structures over virtualized system.

The Typical NSX  security algorithm consists of MD5 algorithm.The MD5 message-digest algorithm is a widely used cryptographic Hash function producing 128- bit (16-byte) hash value, typically expressed in text format as a 32 digit hexadecimal number.
MD5-verification.png                                                      Figure:MD5 key Implementation example

MD5 has been utilized in a wide variety of cryptographic applications, and is also commonly used to verify data integratiy of data centers .During network traffic security supplied by a MD5 algorithm ciphering over the platform.By usage of TCP protocol at the NSX makes necessary to use of firewalls too.

Upgrade-NSX-V-vs-Firewall.png                                                          Figure: NSX versus Configuration Firewall

Related Helpful Sources ,Further Reading and Link;
For administration guide; http://www.vmware.com/support/pubs. EN-001269-01
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