sajitsasi / ip-forward-azure

Securely connect to an External Endpoint from Azure

Introduction

This is a simple solution that uses an Azure Standard Load Balancer and 2 VMs to forward packets to a destination endpoint as shown in the figure below:

Installation

1. Run ./create_infra.sh which will create all the necessary infrastructure
2. Run the following commands in each of the forwarding VMs (this assumes you're connecting via Bastion VM): Note: fwdvmX = fwdvm1 or fwdvm2 <dest_hostname> = Destination hostname like www.bing.com or similar

   ssh bastionvm
   ssh fwdvmX
   sudo apt-get update && sudo apt install iptables-persistent netfilter-persistent -y
   sudo curl -o /usr/local/bin/ip_fwd.sh https://raw.githubusercontent.com/sajitsasi/ip-forward-azure/main/ip_fwd.sh
   sudo chmod +x /usr/local/bin/ip_fwd.sh
   echo "net.ipv4.ip_forward=1" | sudo tee -a /etc/sysctl.conf
   sudo sysctl -p
   sudo /usr/local/bin/ip_fwd.sh -i eth0 -f 80 -a <dest_hostname> -p 80
   sudo /usr/local/bin/ip_fwd.sh -i eth0 -f 443 -a <dest_hostname> -p 443
   

Contributing

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This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [e-mail] with any additional questions or comments.