How to Install Xymon | Ubuntu 20.04

Just did a clean install of Ubuntu 20.04.4 LTS and fully patched it before installing xymon. For my specs (overkill) I gave it 8 cores, 16GB, and 90GB drive.

Clean Ubuntu Install

SSH into your server and run the following to get the latest package and start the install

sudo apt-get update

Sudo apt-get install apache2 rrdtool librrd-dev libpcre3-dev libssl-dev ldap-utils libldap2-dev fping

sudo apt-get -y install xymon

You’ll be prompt with a pink configuration screen asking you to provide a static IP. (highly recommended)

Xymon Server IP Configuration

Enter the IP you wish to use and press ENTER.

That’s it, xymon server is installed but we still need to grant user access via Apache. To verify xymon is installed load the server ip in your browser http://<YOURSERVERIP> and you should be greeted with Apache2 Ubuntu Default Page.

Apache2 Ubuntu Default Page

Now let’s see what happens if we try to load xymon. Try http://<YOURSERVERIP>/xymon. You’ll see a forbidden page. Which is good, means it working we just need to grant access to it.

Forbidden – You don’t have permission to access this server.

Go back to your ssh session to your server and let’s edit xymon.conf in Apache2.

sudo nano /etc/apache2/conf-enabled/xymon.conf

Since my server is protected internally already I’m just going to be granting everyone access. Not the best practice/recommended way but you can follow xymons install guide to secure it. (Configuring your webserver section)

Change the 3 sections circled in red below to

 Allow From All
 Satisfy Any


After commending out existing lines

Ctrl + C to exit and save it.

Restart Apache to load our changes

sudo systemctl restart apache2.service

Now let’s see what happens when we load http://<YOURSERVERIP>/xymon

Xymon working!

It’s works. That’s it!

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