3.6 Installing CentOS
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Video Transcription
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>> Welcome back to the summary course
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in building your InfoSec Lab.
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I'm your host and Instructor, Kevin Hernandez.
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In our last few lessons,
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we actually went over
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the installation of several next-gen firewalls.
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To be more precise,
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we looked at both IP fire and P of sense.
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In today's lesson, we're going to install CentOS,
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which is a pre requirement in order to install QRadar,
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one of our SIEMs.
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For the purposes of this lab,
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the version of CentOS that is
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required to run QRadar Version
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7.3.1 is CentOS 7.5,
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which is provided directly
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through IBM in its own website.
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Some important steps is you have the option
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also to disable IPV6 during the installation.
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This will greatly reduce
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the complexity off the QRadar installation.
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You won't see the step taken
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during the installation as this is not explicitly
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mentioned during the QRadar installation
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nor its installation guide.
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However, after successfully installing QRadar in
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several instances between both my lab
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and other people's labs,
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I noticed that performing this minor task
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greatly reduces the complexity
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and therefore my recommendation to you.
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Now let's get started. Now let's talk about QRadar.
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If you want to install QRadar Community Edition Version
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7.3.1,
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and you look very carefully
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into the community editions documentation,
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you'll be able to notice something very peculiar.
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Right here on Page 2,
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installing an operating system
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for QRadar Community Edition,
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you see that you either have to install CentOS or
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Red Hat Linux version
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7.5 in order to run QRadar Community Edition.
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This is where it gets tricky.
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If you go to, let's say the CentOS,
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and you come to download CentOS,
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you have a DVD and minimal ISO.
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If you go to this DVD, you can see that all of
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these are Version 7.6.
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Now, I personally tried
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installing QRadar in Version 7.6,
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and I spent hours troubleshooting
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and it became basically next to impossible.
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I even came across
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this small installation guide in the developers form,
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or a person submits
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the following recommendations in
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order to get it installed.
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Even when I tried this,
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it still was near impossible getting
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QRadar to fully installed in 7.6.
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Now what happens is I came back to CentOS and I spent
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countless hours looking like such as
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if [inaudible] you try alternate downloads.
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Right here I was able to find a 7.5 version supposedly.
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But once I click,
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you can see there's nothing in there.
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Therefore, I went in a while hunt.
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To be honest, I was able to find
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an old version of this page,
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but all the mirror links were completely gone.
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I wanted to wild this chase.
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However, in desperation, I wanted to
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look for more information regarding
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QRadar or if there's a new version that came out,
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that's a Part 7.6,
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and scrolling up and down,
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I noticed this over here.
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Literally once you click CentOS 7.5, let's download it.
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Now this is the minimalist version,
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it's not the full version.
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I want you to be aware of that.
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What this means you will not have a [inaudible]
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less to manually installing,
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so please be aware of that.
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But it should be more than enough to install QRadar.
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Let's go ahead and install QRadar.
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Let's go ahead and login in into
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our VMware and rewrite here.
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You can see right now we have a PF sense and IP fire.
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Let's create a new VM, create a new virtual machine.
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Now, if you remember correctly
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from our prior videos right here,
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QRadar requires a minimum of 110 gigabytes.
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I personally thought maybe 60 gigs
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might work because we're not
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>> going to have too much data.
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>> However, QRadar itself requires a 80 gigs installation,
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otherwise installation will fail.
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Let's make sure we at least assign
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100 gigs to this operating system.
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Even though our hard drive is
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256, it should be more than enough.
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Now let's call this CentOS. Let's pick Linux.
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Here we have CentOS Version 7. Hit Next.
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Again, our prior installations,
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let's select the default drive as it is the only one we
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have available at the moment, and hit next.
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Here are VM options.
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You can see we have the adapters.
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We can always add our newest adapter that
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we just configured recently.
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Here we have to change it.
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Before you change a number on the left side,
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make sure you switch to gigabytes first.
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Let's assign six gigs,
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as recommended by our minimum specs.
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Let's assign two CPU cores.
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Regarding to hard drive,
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you know 16 gigs not enough.
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Let's assign a 100 gigabytes.
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Now remember, this will only be
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utilized while the system is up.
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Therefore, we can also install other variants or
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other OSs that might be working together with the CPUs.
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Now we have CD drive,
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come down, let's pick the image
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>> like in prior instances.
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>> Now be careful you don't pick a wrong version here.
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Let's be real careful about that.
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If you see both of them
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are dot six even though it doesn't say it.
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Let's go down to the one we
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just downloaded, and let's bring it up here.
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Due to the time here,
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I'm going to add a little five next to it just so I
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can recognize it better in there.
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Let's close it, and let's find that image in here.
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Once we find it, we're going to pick it.
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You see, almost clicked the wrong one.
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But you can also tell the last digits,
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which is a slightly older version.
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Open, and let's wait for it to upload it.
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This an OS image,
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so it might take a little bit longer than
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IP fire and PF sense.
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However, it is still the minimalists version
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instead of the full version,
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so it should not take as long as
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a full blown four gigs upload.
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However, let's give it a second.
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It's fully completed.
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Let's make it sure like the proper version is again.
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This five really helps, and hit Select.
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Make sure everything's set correctly, 600 lane network.
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Looks fine to me. Let's hit Next.
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Verify again. Everything looks good.
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Let's hit Finish. The VM should be there now.
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Now let's go ahead and start
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DOS and select install Center 7.
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Press Enter to begin installation.
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Let's have the services start.
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There we go. Into the installation there.
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Let's pick English as a language and
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English as keyboard, and hit Continue.
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Let's wait for it to load our settings.
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It's going to look for keyword language, installation,
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source, software selection, etc.
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Let's go here. Select hard drive, hit Done.
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Next we're going to Host Name, make
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sure we select the proper one.
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If you're not sure which is which,
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you can always come here to the Noachian.
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CentOS, and right here under network arts,
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you can identify which is which.
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BA is our primary one,
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so let's select that one.
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Turn it on, so drag-and-drop, go figure.
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[LAUGHTER] Let's make sure we take a snippet of
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that for future use and references.
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Just go back to our document,
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QRadar, CentOS really, hit Save.
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Go back to the installation, hit done.
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I'll make this a little bit bigger
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>> so it's easier to see.
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>> Say the disk, select it.
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Done. Here we go.
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We'll try to partition select it.
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That it looks it's about ready.
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Americans, local media,
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you can always go to suffer selection.
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Here, if you choose a DVD version
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or able to choose or pick the DVD version,
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you're going to actually select it.
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For example, to SMTP e-mail oldest features as well.
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Sadly, I was unable to find out version currently.
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Let's begin the installation.
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Now as you see after the progressing,
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you have the option to create
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users as well as a root password.
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I'm going to go ahead and show you the screens,
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full name, username, password,
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and confirm the password.
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For example, if you go first and last
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name you can see it's F to show on the last name,
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it's a current format and also the password.
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You can select to make an administrator or not.
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Let me go pause the video and fill this up myself.
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Once done, you will see that it will
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say administrator under your name.
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Then the same thing for a root password,
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you just put a repressor the root account obviously.
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Let me fill that up as well and continue the video.
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After that you can see the both root password is
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set and the administrator will show up.
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Normally this error you're seeing
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on the screen where you are not able to
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see everything is when you tap out of the screen,
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which is what happened when we took the screenshot,
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but don't be too concerned.
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Let's give it a few minutes for
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it to finish the installation.
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Let's complete it. You will see
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the Complete icon right here on top of the blue line.
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Hit Complete on this boot on the little blue box
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, and that's it.
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Once the system is rebooted,
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centers should be installed.
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It's properly loading. Here's where you log in.
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There we go. What have we learned today?
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Basically, we install CentOS, to be precise,
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Version 7.5 minimalists,
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which is a requirement for QRadar.
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Talking about QRadar, in
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our next lesson we'll be actually installing QRadar.
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Hope to see you soon. Have a great day.
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