Morgen Friedel morgenfriedel

Zerotier Ubuntu config notes

Setting up the default gateway (for VPN tunelling)

Ubuntu 18.04 UFW settings, based on [1] Step 1

ens3 .. primary physical ETH interface
10.243.0.0/16 .. ZT network

Libssh authentication bypass vulnerability (CVE-2018-10933)

An analysis of Censys Public Scan 20180807 (only port 22) to estimate the number of servers {potentially} vulnerable to the recent Libssh bug.

QEMU/KVM Cheatsheet

Create KVM image with virt-build

cd /var/lib/libvirt/qemu/

sudo virt-builder fedora-26 \
--arch x86_64 \
--size 20G \
-m 8192 \

Install Wordpress on CentOS 7

Install LAMP

$ sudo yum install httpd mariadb mariadb-server php php-common php-mysql php-gd php-xml php-mbstring php-mcrypt php-xmlrpc unzip wget -y

Enable Apache and MariaDB as service

$ sudo systemctl start httpd

Networking Tools

netstat

-i interface config info (use ifconfig -a on Linux for verbose interface info)
-a all ports(listening and non-listening)
-l all listening ports
-t listening TCP ports
-p display PID and program names
-c it's like watch
-rn list routes but don't resolve ip
-n numeric ports

One million posts

Let's create one million posts to see the performance of a Wordpress site.

Creation of a post

The purpose of this document is to find out what is the underlying data that gets modified in a wordpress database when a post with an image are created.

	echo "---------------------------------------------------"
	echo "Warning: Enter Your Wordpress path in proper format as Example shown below:"
	echo "Example: var/www/html/wordpress/"
	echo "---------------------------------------------------"
	read path
	echo "enter permission type d (default is 755)"
	read perm1
	echo "enter permission type f (default is 644)"
	read perm2
	sudo chown -R www-data:www-data ../../../../../../../../$path

	### Sites:
	https://gtmetrix.com/
	https://developers.google.com/speed/pagespeed/insights/

	### Plugins
	https://wordpress.org/plugins/query-monitor/
	https://wordpress.org/plugins/autoptimize/
	https://wordpress.org/plugins/wp-super-cache/
	https://wordpress.org/plugins/ewww-image-optimizer/
	https://wordpress.org/plugins/jetpack/

	#!/bin/bash

	#set your servername and email here
	SERVERNAME=
	EMAIL=

	mkdir /wpinstall
	cd /wpinstall

	#generate password for mysql

	## Pull in static configs
	source ~/.bash_anchorhost

	function wpengine_local_restore {

	## Prompt for dynamic configs
	read -p $'\e[31mWP Engine snapshot url\e[0m: ' wpengine_snapshot
	read -p $'\e[31mLocal database name (will create)\e[0m: ' db_name
	read -p $'\e[31mProduction site url ( ex: anchor.host )\e[0m: ' siteurl_production
	read -p $'\e[31mLocal site url ( ex: anchor.dev )\e[0m: ' siteurl_local