VMware NSX has two types of firewall, namely the NSX Edge Firewall and the NSX Distributed Firewall(DFW). The Edge Firewall is optimized for north-south (client to server) traffic whereas the DFW is optimized for east-west (server-to-server) traffic:

In this chapter, we will be focusing on the NSX DFW. NSX DFW enables the creation of small segments (microsegments) in virtualized environments through VMware NSX DFW native technology as well as integration (service-chaining) with third-party vendors. The NSX DFW is implemented in the vSphere hypervisor, and rules are enforced on each virtual machine's network adapter or virtual ...

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