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README.md

AWS Point to Site VPN Setup (Free OpenVPN AWS Setup | EC2 | Route53 Private DNS | Ubuntu 20.04)

YouTube Tutorial

Create AWS VPC

  • Create AWS VPC (Virtual Private Cloud)
    • give it a name main
    • define IPv4 CIDR block 10.0.0.0/16

Create AWS Internet Gateway

  • Create AWS Internet Gateway

    • call it igw

  • Attach Internet Gateway to AWS VPC

Create AWS Public Subnet

  • Create public subnet

    • call it public
    • define IPv4 CIDR block 10.0.0.0/22, it will give you 1,024 IP addresses, witht the last IP - 10.0.3.255

  • Create public route table with default route to the internet gateway

  • Attach public route table to the public subnet

Create AWS NAT Gateway

  • Allocate Elastic IP address for nat

    • tag Name: nat

  • Create NAT gateway

    • call it nat

  • Place it to public subnet

Create AWS Private Subnets

  • Create private-large subnet 10.0.16.0/20

  • Create private-small subnet 10.0.32.0/24

  • Create private route table with default route to nat gateway

  • Update route tables for private subnets

Create Ubuntu EC2 Instance

  • Allocate static public IP address openvpn

  • Create Ubuntu 20.04

    • tag Name: openvpn
    • Instance type: t3.small
    • SG: OpenVPN, add 1194 custom udp from Anywhere

  • Associate Elastic IP with EC2

Install OpenVPN on Ubuntu 20.04

  • Update permissions on the key
chmod 400 devops.pem
  • SSH to the Ubuntu server
ssh -i devops.pem ubuntu@<ip>
  • Update Ubuntu repositories
sudo apt update
  • Check OpenVPN candidate
apt policy openvpn

  • Compate verion with the latest release of OpenVPN on GitHub

  • We would need to run commands as a root, let's temporary use sudo -s

sudo -s
  • Then import the public GPG key that is used to sign the packages:
wget -O - https://swupdate.openvpn.net/repos/repo-public.gpg|apt-key add -
  • Add OpenVPN repo
echo "deb http://build.openvpn.net/debian/openvpn/stable focal main" > /etc/apt/sources.list.d/openvpn-aptrepo.list
  • Update repositories again with the new openvpn source list
apt update
  • Exit root
exit
  • Check version of candidate again
apt policy openvpn
  • Install the latest one
sudo apt install openvpn=2.5.3-focal0

Install easy-rsa on Ubuntu 20.04

  • Check the candidate verion
apt policy easy-rsa

  • Check available verions on GitHub

  • Download easy-esa tarball

wget https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.8/EasyRSA-3.0.8.tgz
  • Untar it
tar -zxf EasyRSA-3.0.8.tgz
  • Clean UP
ls
rm EasyRSA-3.0.8.tgz
  • Move easy-rsa to OpenVPN
sudo mv EasyRSA-3.0.8/ /etc/openvpn/easy-rsa
  • (Optionally) create soft link
sudo ln -s /etc/openvpn/easy-rsa/easyrsa /usr/local/bin/
  • Change directory to home and test cli
easyrsa --version

Creating PKI for OpenVPN with easy-rsa

  • Change directory to openvpn
cd /etc/openvpn/easy-rsa
  • Initialize a PKI CA
easyrsa init-pki
  • List directories
ls
ls pki
  • Create vars file
vim vars
  • Create CA (security or convenience)
easyrsa build-ca nopass
  • List files
ls pki
ls pki/private

Generate Certificate for OpenVPN Server

  • Generate signing request
easyrsa gen-req openvpn-server nopass
  • Sign cert
easyrsa sign-req server openvpn-server

Configure OpenVPN Cryptographic Material

  • Generate the tls-crypt pre-shared key
openvpn --genkey secret ta.key
cat ta.key

Configure OpenVPN server

  • Enable IP forwarding
sudo vim /etc/sysctl.conf
  • Read the file and load the new values for the current session
sudo sysctl -p
  • Configure IP Tables
sudo iptables -t nat -S
  • Find out network public network interface
ip route list default
  • Configure nat routing
sudo iptables \
  -t nat -I POSTROUTING -s 10.8.0.0/24 -o ens5 -j MASQUERADE
  • Save iptables
sudo apt-get install iptables-persistent
  • Create config file, leave routes out for now
sudo vim /etc/openvpn/server/server.conf
  • Check if you have nobody user
cat /etc/passwd | grep nobody
  • Check if you have nogroup
cat /etc/group | grep nogroup

  • Check subnet masks for CIDR here

  • Start OpenVPN

sudo systemctl start openvpn-server@server
  • Check status OpenVPN
sudo systemctl status openvpn-server@server
  • Enable openvpn-server
sudo systemctl enable openvpn-server@server
  • Check logs
journalctl \
  --no-pager --full -u openvpn-server@server -f

Create Client Profile .ovpn Manually

  • Generate key pair
easyrsa gen-req example-1 nopass
  • Sign certificate request
easyrsa sign-req client example-1
  • Create example-1.ovpn profile
cat /etc/openvpn/easy-rsa/pki/ca.crt
cat \
  /etc/openvpn/easy-rsa/pki/issued/example-1.crt
cat \
  /etc/openvpn/easy-rsa/pki/private/example-1.key
cat /etc/openvpn/easy-rsa/ta.key
  • Install tunnelblick
brew install --cask tunnelblick

  • Install example-1.ovpn profile

  • Run journalctl on OpenVPN server

journalctl \
  --no-pager --full -u openvpn-server@server -f

  • Connect to the VPN

  • Check routes on mac

netstat -r

  • Create Ubuntu server in private-small subnet

    • Use openvpn security group as a source

  • SSH to Ubuntu using private IP address

ssh -i devops.pem ubuntu@<private ip>

Create Route53 Private Hosted Zone

  • Create devops.pvt private hosted zone

  • Create test.devops.pvt A record with random IP address

  • Try to resolve it from development host

dig test.devops.pvt
  • Enable VPC DNS resolution
    • To use private hosted zones, you must set the following Amazon VPC settings to true:
      • enableDnsHostnames
      • enableDnsSupport

Revoke OpenVPN Client Certificate

  • Revoke example-1 certificate
cd /etc/openvpn/easy-rsa/
easyrsa revoke example-1
  • Generate CRL (Certificate Revocation List)
easyrsa gen-crl
  • Add CRL to OpenVPN server config
sudo vim /etc/openvpn/server/server.conf
crl-verify /etc/openvpn/easy-rsa/pki/crl.pem
sudo systemctl restart openvpn-server@server
journalctl \
  --no-pager --full -u openvpn-server@server -f

Generate profiles

cd /etc/openvpn/
sudo mkdir client-configs
cd client-configs
sudo vim base.ovpn
cd /etc/openvpn/easy-rsa/
easyrsa gen-req example-2 nopass
easyrsa sign-req client example-2
vim gen_client_profile.sh
sudo chmod +x gen_client_profile.sh
sudo ./gen_client_profile.sh example-2
cat \
  /etc/openvpn/client-configs/example-2.ovpn

  • Create example-2.ovpn

  • Install example-2.ovpn profile

  • Check DNS again

dig test.devops.pvt

Install docker on Ubuntu 20.04

  • Set up the repository
sudo apt install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg \
    lsb-release
  • Add Docker’s official GPG key
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
  • Set up the stable repository
echo \
  "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
  • Install Docker Engine
sudo apt update
sudo apt install \
  docker-ce docker-ce-cli containerd.io
  • Install docker compose
sudo apt install docker-compose
  • Create docker-compose.yaml to run MySQL 5.7
vim docker-compose.yaml
  • Run docker compose up
sudo docker-compose up -d
  • Check running containers
sudo docker ps

Configure MySQL 5.7 Server for gate-sso

  • Install MySQL client
sudo apt install mysql-client
  • Connect to mysql
mysql -u root -p -h 127.0.0.1 -P 3306
  • Create user for gate-sso
CREATE USER 'gate' IDENTIFIED BY 'devops123';
  • Grant access to gate_development and gate_test databases
GRANT ALL PRIVILEGES ON gate_development.* TO 'gate';
GRANT ALL PRIVILEGES ON gate_test.* TO 'gate';
FLUSH PRIVILEGES;
  • Log out
exit

Install Ruby on Rails on Ubuntu 20.04

  • Check ruby version (must be >= 2.4)
ruby -v
  • Install rvm
curl -L https://get.rvm.io | bash -s stable
  • Import GPG keys
curl -sSL https://rvm.io/mpapis.asc | gpg --import -
curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -
  • Run script again
curl -L https://get.rvm.io | bash -s stable
  • To start using RVM, load the script environment variables using the source command:
source ~/.rvm/scripts/rvm
  • Install ruby 2.4.3 with rvm
rvm install 2.4.3
  • Install bundler gem
gem install bundler

Install gate-sso

  • Clone gate-sso GitHub repository
cd /opt
sudo git clone https://github.com/gate-sso/gate.git
  • Update ownership of the repository
sudo chown -R ubuntu:ubuntu gate
  • Install gate-sso dependencies
cd gate
bundle install
  • Fix deps
sudo apt-get install libmysqlclient-dev
  • Run bundle install again
bundle install
  • Install nodejs
sudo apt install nodejs
  • Run again
rake app:init
vim .env
GATE_SERVER_URL=http://gate.devopsbyexample.io
GATE_OAUTH_CLIENT_ID=771040318735-7anf9ct0fo5a23s6gqsnmc2vo3ifbo28.apps.googleusercontent.com
GATE_OAUTH_CLIENT_SECRET=8SNXY_H7RE2-nffqDGIKGZ9i
GATE_HOSTED_DOMAIN=devopsbyexample.io
GATE_HOSTED_DOMAINS=antonputra.com
GATE_DB_HOST=127.0.0.1
GATE_DB_PASSWORD=devops123

  • Create A record for gate.devopsbyexample.io

  • Run setup

rake app:setup

  • Open port 80 on SG

  • Create sudo vim /etc/openvpn/easy-rsa/gen-client-conf (Update remote ip)

  • Create sudo vim /etc/openvpn/easy-rsa/gen-client-keys (Update remote ip)

  • Start rails

rvmsudo rails server \
  --port 80 \
  --binding 0.0.0.0 \
  --daemon

Links

Clean UP

  • VPC main
  • Key pair devops
  • Release public IPs
  • Delete tunnelblick
brew remove tunnelblick
  • Delete Route53 hosted zone devops.pvt
  • Remove GCP credentials
  • Remove gate.devopsbyexample.io A record