There are other aspects of ESXi security besides users, groups, and roles. Many of them are related to network security, such as firewall and the SSL certificates, and the ability to access hosts remotely.
These network-related security features just mentioned will be discussed in the later sections of this chapter.
The primary objective of a firewall is to control the network traffic by analyzing it and making a decision whether this traffic should be allowed or blocked.
When it comes to a virtual environment, firewalls can be implemented in the following components: