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- [Instructor] The area behind our Ubuntu router serving as

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a network firewall is a demilitarized zone or DMZ.

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We call it DMZ because it's a relatively safe place

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after our first layer of firewall filtering

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our goal is to provide an HTTP service

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on our Ubuntu local host in the DMZ.

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Let's start by installing

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a popular Linux web server called apache

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type sudo,

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space apt

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space install,

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space apache two

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press enter

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type Y press enter.

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Now you have a working HTTP or web server

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on the Ubuntu local host.

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Let's check the status of the apache web server

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type sudo space

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system ctl

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space apache two

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space status

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press enter

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wrong sequence

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type sudo

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system ctl

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space status

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apache two

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press enter.

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The web server is up and running.

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If it's down, start the web server

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by typing sudo system ctl

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apache two space start

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and then press enter

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an ultimate test to check if

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the web server is up and running is

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opening a web browser and loading a homepage

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type local host

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and press enter.

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As you can see, you can load the default page from

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the web server on the Ubuntu local host.

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the successfully loaded test page means that

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the web server is up and running

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to restart the web server

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type sudo space system ctl

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space, restart space

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apache two like this

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press enter

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to stop the web server

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type sudo system ctl

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stop apache two

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press enter.

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Let's check the status of the web server again

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by typing sudo system ctl

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status apache two

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press enter.

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The web server is no longer running

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for now the host in our DMZ,

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which is the same local area network

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behind Ubuntu router slash Network firewall

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are the only ones that can access the web server.

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The next step is to enable port forwarding

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to allow host on the internet

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to send the request to our web server.