Guide for a secure setup on a MacOS host
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README.md

Secure setup on a MacOS host

This repository is a guide to create your own secure setup on a MacOS host. In this setup, all traffic from the virtual machines will be routed through a VPN tunnel. For the VPN tunnel, Private Internet Access will be used as example in this guide.

My setup

  • MacOS Sierra (10.12.3)
  • VMWare Fusion (8.5.0)
  • Private Internet Access (PIA) VPN
  • VyOS Routing VM (1.17)
  • Kali and Ubuntu VM's

Network Diagram

Network Diagram v1

VyOS Diagram

VyOS Diagram v1

Setup

Install VyOS

  • Download the latest stable image of VyOS here: https://vyos.io/#downloads
  • Create a new VM and choose Install from disc or image as installation method.
  • Select the downloaded image of VyOS.
  • Customize the VM settings to 2 GB hard disk capacity and 512 MB memory.
  • Set the network adapter in private mode (Private to my Mac).
  • Boot the VM, and press return to boot the Live CD image.
  • Login to the system using the default username:password => vyos:vyos
  • Type install image to install the image on disk.
vyos@vyos:~$ install image
Welcome to the VyOS install program.  This script
will walk you through the process of installing the
VyOS image to a local hard drive.
Would you like to continue? (Yes/No) [Yes]: yes
Probing drives: OK
Looking for pre-existing RAID groups...none found.
The VyOS image will require a minimum 1000MB root.
Would you like me to try to partition a drive automatically
or would you rather partition it manually with parted?  If
you have already setup your partitions, you may skip this step

Partition (Auto/Parted/Skip) [Auto]: [return]

I found the following drives on your system:
 sda	2147MB


Install the image on? [sda]: [return]

This will destroy all data on /dev/sda.
Continue? (Yes/No) [No]: yes

How big of a root partition should I create? (1000MB - 2147MB) [2147]MB: [return]

Creating filesystem on /dev/sda1: OK
Done!
Mounting /dev/sda1...
What would you like to name this image? [1.1.7]:
OK.  This image will be named: 1.1.7
Copying squashfs image...
Copying kernel and initrd images...
Done!
I found the following configuration files:
    /config/config.boot
    /opt/vyatta/etc/config.boot.default
Which one should I copy to sda? [/config/config.boot]: [return]

Copying /config/config.boot to sda.
Enter password for administrator account
Enter password for user 'vyos': vyos  # You will change this later
Retype password for user 'vyos': vyos  # You will change this later
I need to install the GRUB boot loader.
I found the following drives on your system:
 sda	2147MB


Which drive should GRUB modify the boot partition on? [sda]: [return]

Setting up grub: OK
Done!
  • Run reboot to boot VyOS from disk
vyos@vyos:~$ reboot
Proceed with reboot? (Yes/No) [No] yes
  • You can now unmount the CD drive from the VM if you want to.

Setup SSH

Using your own terminal is much more convenient to interact with VyOS, e.g. if you want to copy and paste commands into the console. Therefore we will set up SSH first through the KVM console.

First, enter the configuration mode. Only in this mode you are allowed to edit configuration rules in VyOS. The prompt symbol will change from $ to #.

vyos@vyos:~$ configure
[edit]
vyos@vyos#

You can exit the configuration mode using the command exit.

Enable the eth0 interface in dhcp mode:

set interfaces ethernet eth0 address dhcp

Enable the SSH service of VyOS:

set service ssh port 22

Commit the changes, save them and exit the configuration mode.

vyos@vyos# commit
[ interfaces ethernet eth0 address dhcp ]
Starting DHCP client on eth0 ...

[ service ssh ]
Restarting OpenBSD Secure Shell server: sshd.

[edit]
vyos@vyos# save
Saving configuration to '/config/config.boot'...
Done
vyos@vyos# exit
vyos@vyos$

Now you should be able to SSH into VyOS with your own terminal. You can look up the IP address of the VyOS VM with the following command:

vyos@vyos:~$ show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface        IP Address                        S/L  Description
---------        ----------                        ---  -----------
eth0             172.16.1.130/24                   u/u
lo               127.0.0.1/8                       u/u
                 ::1/128
$ ssh vyos@172.16.1.130
The authenticity of host '172.16.1.130 (172.16.1.130)' can't be established.
RSA key fingerprint is SHA256:5mIixFcwGJ53pxjgws0M6wlAhH1IhZq93z6V/xIrTVQ.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.16.1.130' (RSA) to the list of known hosts.
Welcome to VyOS
vyos@172.16.1.130's password: vyos
Linux vyos 3.13.11-1-amd64-vyos
Welcome to VyOS.
This system is open-source software. The exact distribution terms for
each module comprising the full system are described in the individual
files in /usr/share/doc/*/copyright.
vyos@vyos:~$ 

It is easier to add the VyOS host to your SSH config, such that you do not have to type the IP address every time. From now on, ssh vyos will be used in all commands.

~/.ssh/config
Host vyos
        HostName 172.16.1.130
        User vyos

Create and configure network adapters in VM's

First, we need to create a virtual network for the VM's which traffic needs to go through the PIA VPN tunnel. Create a new virtual network in VMWare Fusion (Preferences > Network > +). In my case, the new virtual network is named vmnet4. Due to limitations of VMWare, you cannot change the name of the virtual network. Uncheck all boxes, because VM's will only communicate to the routing VM. Create and configure network adapters for the VM's as following:

VyOS VM

For the VyOS VM, create and configure three network adapters:

  • eth0: Private to my Mac
  • eth1: Bridged mode (Autodetect)
  • eth2: vmnet4

VM's which traffic needs to go through the VPN tunnel

For other VM's, configure one network adapter:

  • eth0: vmnet4

Setup configuration

pia-secret.txt
p12345678
password123

Execute the following commands in your Mac terminal:

# Unzip PIA OpenVPN config file
user@mac:~$ unzip openvpn-strong-tcp.zip

# Create the folder '/config/auth/pia' on the routing VM
user@mac:~$ ssh vyos mkdir -p /config/auth/pia

# Copy the content of 'openvpn-strong-tcp' to the pia folder
user@mac:~$ scp openvpn-strong-tcp/* vyos:/config/auth/pia

# Copy the credentials to VyOS
user@mac:~$ scp pia-secret.txt vyos:/config/auth/pia

# Copy the template configuration file to VyOS
user@mac:~$ scp config.boot vyos:/config/config.boot

PIA - Username/Password Authentication

Private Internet Access uses username/password authentication for VPN connections. Therefore there is no cert-file or key-file needed. However, VyOS requires a cert-file and a key-file for every OpenVPN tunnel interface. To bypass the cert-file and key-file requirement, apply the following fix.

Download the patch here and run the following command:

user@mac:~$ ssh vyos sudo patch /opt/vyatta/share/perl5/Vyatta/OpenVPN/Config.pm < patch-ovpn-user-pass.txt

Up and Running

The last step is to reboot the routing VM to load the configuration of the new config.boot file. Normally it is also possible to load the configuration from file without reboot (configure > load > commit > save > exit). However, the interfaces in the new config.boot do not have hardware addresses, but they will be automatically set during startup.

user@mac:~$ ssh vyos sudo reboot

Your secure setup is now up and running! 🎉

What to do now?

Change password

set system login user vyos authentication plaintext-password mypassword

This command will automatically convert your plaintext password and store it as a secure password hash.

Add ssh-key

user@mac:~$ scp ~/.ssh/id_rsa.pub vyos:.

# SSH into VyOS and enter configuration mode
vyos@vyos# loadkey vyos id_rsa.pub

Done
[edit]
vyos@vyos# save
Saving configuration to '/config/config.boot'...
Done
[edit]
vyos@vyos# exit
exit

Change timezone

set system time-zone America/Los_Angeles

Tip: Use TAB to show options and to autocomplete.

Change PIA server

set interfaces openvpn vtun1 remote-host nl.privateinternetaccess.com

Find all other PIA servers here.

Create your own custom configuration

This is my current setup, but VyOS has many features like firewalls, static and dynamic routing, tunnel interfaces, proxies and more. If you want to learn more about VyOS, go to https://wiki.vyos.net/wiki/User_Guide.

Star this repo

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