Sam R. Sam-R

Installing Zabbix on Ubuntu 18.04

Note that this guide assumes an "All in one" server setup, where the Zabbix Server and supporting database are all on one machine. It also asusmes Zabbix Proxy is not used, or will be setup later.

NOTE: content based on https://www.zabbix.com/documentation/4.0/manual/installation/install_from_packages/debian_ubuntu

For trouble shooting, review the Zabbix logs located at /var/log/zabbix/zabbix_server.log

Setup

sudo nano /etc/fail2ban/filter.d/nextcloud.conf

[Definition]
failregex=^{"reqId":".*","remoteAddr":".*","app":"core","message":"Login failed: '.*' \(Remote IP: '<HOST>'\)","level":2,"time":".*"}$
	^{"reqId":".*","level":2,"time":".*","remoteAddr":".*","app":"core".*","message":"Login failed: '.*' \(Remote IP: '<HOST>'\)".*}$
	^.*\"remoteAddr\":\"<HOST>\".*Trusted domain error.*$

MySQL

Create a MySQL instance in a docker container that's bound to the hosts standard MySQL ports. This is useful if you're developing locally without a docker-compose enviornment and don't want to run MySQL on your local or virtual machine.

sudo docker run --name mysql5 -e MYSQL_ROOT_PASSWORD=toor -P 3306:3306 -d mysql:5

You should be able to connect to the server using root and toor as credentials.

mailq | \
  grep -E "Connection (refused|timed out)" -B1 | \
  grep -E "^[A-Z0-9]{10}\s+" | \
  awk '{print $1}' | \
  postsuper -d -

mailq | \
  grep -E "Connection (refused|timed out)" -B1 | \
  grep -E "^[A-Z0-9]{11}\s+" | \
  awk '{print $1}' | \
  postsuper -d -

Ansible notes

plays

tasks actions to take inside a play

registers capture output from a task

handlers handle errors and can execute an action

Create a basic PHP and nginx container pair, mounting their local working directory.

docker-compose.yml

version: '3'

services:
    nginx:

	<?php

	// Webpage to load
	$url = "https://uk.trustpilot.com/review/your-page-here";

	// Contents of webpage
	$contents = file_get_contents($url);

	// Declair a new DOM
	$doc = new DOMDocument('1.0', 'UTF-8');

	`sudo nano /etc/fail2ban/filter.d/nextcloud.conf`


	```
	[Definition]
	failregex=^{"reqId":".","remoteAddr":".","app":"core","message":"Login failed: '.' \(Remote IP: '<HOST>'\)","level":2,"time":"."}$
	^{"reqId":".","level":2,"time":".","remoteAddr":".","app":"core".","message":"Login failed: '.' \(Remote IP: '<HOST>'\)".}$
	^.\"remoteAddr\":\"<HOST>\".Trusted domain error.*$
	```