If you are already familiar with the concepts, and would like to see the iptables setup, feel free to skip to the Overview of Iptables Configuration section.

How To Set Up a Firewall Using Iptables on Ubuntu 14.04.

How To Enable DigitalOcean Private Networking on Existing Droplets.

How To Set Up And Use DigitalOcean Private Networking.

Also, if you would like to read up on setting up a VPS with private networking or iptables basics, here are a few links that you might find to be useful (this tutorial assumes you know the basics of iptables):

If your setup doesn’t look like this, you should still be able to follow along. haproxy-www: Reverse proxy load balancer.The example environment uses five VPSs (and iptables are not configured): Here is a diagram of what the environment looks like: For more information about IPv6 tools, refer to this guide: How To Configure Tools to Use IPv6 on a Linux VPSįor our example, we will use the environment created by the following tutorial: How To Optimize WordPress Performance With MySQL Replication On Ubuntu 14.04 If your VPS is configured for IPv6, please remember to secure both your IPv4 and IPv6 network interfaces with the appropriate tools. For example, iptables only maintains firewall rules for IPv4 addresses but it has an IPv6 counterpart called ip6tables, which can be used to maintain firewall rules for IPv6 network addresses. In Linux, IPv6 security is maintained separately from IPv4. Note: This tutorial covers IPv4 security.

Iptables windows