UDP LoadBalanced VPN using DNS

This feature is available from Aviatrix software version 2.7 and later. AWS Elastic Load Balancing (ELB) does not support UDP traffic. To overcome this, AWS Route53 service is leveraged to direct user VPN traffic to UDP VPN gateways in a round robin algorithm.

Note

UDP based OpenVPN® provides higher packet throughput than TCP based VPN solution. UDP based VPN solution runs on UDP 1194. If you plan to deploy this solution for on-prem users, make sure your corporate firewall is open on UDP 1194 for outbound traffic.

Configuration Workflow

Tip

Upgrade to the latest version. Make sure you are running 2.7+

  1. Create VPN Gateways from Gateways Page. Make sure you have VPN Access option Enabled and Enabled ELB option is No .

  2. Create DNS Loadbalancers a. Go to OpenVPN® -> Advanced -> UDP Loadbalancer b. Click “+New” button

    1. Select cloud type and account (Currently only supported on AWS)
    2. Enter the hosted zone name ( This must exist prior in your AWS Route53)
    3. VPN Service name is a unique identifier for the Loadbalancer. For example a service name “vpn1” and hosted zone “aviatrix.com” will create a DNS entry “vpn1.aviatrix.com”
    4. Select the Gateways that need to be added to the Loadbalancer. If you don’t see any gateways, you properly have created VPN Gateways with ELB enabled (which will load balance TCP based VPN gateway; or you have created a non VPN gateway. (You did not enable VPN Access during gateway creation time.) If your gateway type is incorrect, delete the gateway and create it again.
    5. Hit “OK” and this creates the UDP LoadBalancer
  3. Add VPN Users. a. Add VPN Users directly to the LoadBalancer by going to OpenVPN®->VPN Users page b. In the VPC ID/LB /DNS select the loadbalancer created in Step 2. (“Example:vpn.aviatrix.com”) c. Populate the username and email fields and the VPN user is created

  4. (Optional) Edit DNS LoadBalancer a. You can add or delete gateways to the load balancer after it has been created

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