Manage Network Security

# Manage Network Security
      ## Dennis Kibbe
      ### Mesa Community College
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      # Module Outline
      1. Introduction
      1. Manage Server Firewalls
      1. Guided Exercise
      1. Control SELinux Port Labeling
      1. Key Takeaways
      1. Resources
      1. Graded Lab
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      # Learning Objectives
      *After completing the work in this module you will be able to:*
      1. Accept or reject network connections to system services with `firewalld` rules.
      1. Verify that network ports have the correct SELinux type for services to bind to them.
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      # Introduction
      ## Manage Network Security
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      # Manage Server Firewalls
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      # Guided Exercise
      ## Manage Server Firewalls
      ![Clipart of two students studying](../images/homework.png)
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      # Control SELinux Port Labeling
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      # Guided Exercises
      ## Control SELinux Port Labeling
      ![Clipart of two students studying](../images/homework.png)
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      # Key Takeaways
      1. The `netfilter` framework allows kernel modules to inspect every packet traversing the system, including all incoming, outgoing or forwarded network packets.
      1. The `firewalld` service ships with a number of predefined services. You can list them by using the `firewall-cmd --get-services` command.
      1. SELinux policy tightly controls network traffic by labeling the network ports. When a process wants to listen on a port, When a process wants to listen on a port, SELinux checks to see whether the label associated with it is allowed to bind that port label.
      1. Use the `semanage` command to add, delete, and modify labels.
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      # Resources
      Note: Here are some resources for the topics covered in this chapter.
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      # Graded Lab
      ## Manage Network Security 
      ![Clipart of technicians in white lab coats](../images/lab_techs.png)
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      ![Mesa Community College logo](../images/mcc_logo.png "Mesa Community College")
      Note: This ends this slide presentation. I hope you found it useful.