Network Device Configuration Management - Oxidized

In this lab you will install Oxidized and integrate it with LibreNMS.

Requirements:

Ubuntu 20.04 Server with LibreNMS installed (Use the provided VM) Gmail account with 2-Step Verification On.

Oxidized Installation

Since most of the tasks in this lab require you to be "root", the first thing you should do is to connect to your server and start a root shell.

sudo su
apt update
apt-get install ruby ruby-dev libsqlite3-dev libssl-dev pkg-config cmake libssh2-1-dev libicu-dev zlib1g-dev g++
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
sysctl -w net.ipv6.conf.lo.disable_ipv6=1
gem install oxidized
gem install oxidized-script oxidized-web 

Oxidized Configuration

Create the oxidized user.

useradd -s /bin/bash -m oxidized

Continue with oxidized user.

Setup Oxidized Service

Run the following commands as root user.

cp extra/oxidized.service /etc/systemd/system
mkdir /run/oxidized
chown oxidized:oxidized /run/oxidized
systemctl enable oxidized.service

Start oxidised service

systemctl start oxidized

Restart oxidised service

systemctl restart oxidized

View status of oxidised service

systemctl status oxidized

LibreNMS Integration

Create Token

Login to LibreNMS web GUI. Go to Settings -> API Settings

Click on 'Create API access token'.

Click 'Create API Token'.

Postfix Installation

Postfix will be installed to have email notification of configuration changes.

apt install postfix

Select Internet Site to enable Postfix to sent and receive mails and press Enter to proceed.

Put a suitable domain name for System mail name and proceed.

Postfix Configuration

Here Postfix will be configured to send email to your Gmail account.

vim /etc/postfix/main.cf

smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_security_level=may

smtp_tls_CApath=/etc/ssl/certs
smtp_tls_security_level=may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = librenms
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, librenms-demo.com, librenms, localhost.localdomain, localhost
relayhost = [smtp.gmail.com]:587
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous