Aviatrix Gateway to pfSense


This document describes how to configure an IPsec tunnel between an Aviatrix Gateway and a pfSense firewall using Aviatrix Site2Cloud.

Adding a Site2Cloud Tunnel in Aviatrix Controller

  1. Log in to your Aviatrix Controller.
  2. Select Site2Cloud on the left navigation bar.
  3. Click + Add New near the top of the Site2Cloud tab.
  4. Under Add a New Connection, enter the following:
Field Expected Value
VPC ID / VNet Name Select the VPC/VNet where this tunnel will terminate in the cloud.
Connection Type Unmapped unless there is an overlapping CIDR block.
Connection Name Name this connection. This connection represents the connectivity to the edge device.
Remote Gateway Type Generic
Tunnel Type UDP
Algorithms Unmark this checkbox
Encryption over ExpressRoute/ DirectConnect Unmark this checkbox
Enable HA Unmark this checkbox
Primary Cloud Gateway Select the Gateway where the tunnel will terminate in this VPC/VNet.
Remote Gateway IP Address IP address of the pfSense device.
Pre-shared Key Optional. Enter the pre-shared key for this connection. If nothing is entered one will be generated for you.
Remote Subnet Enter the CIDR representing the network behind the edge device that this tunnel supports.
Local Subnet The CIDR block that should be advertised on pfSense for the cloud network (will default to the VPC/VNet CIDR block)
  1. Click OK.

Creating an IPsec Tunnel in pfSense

  1. Log in to your pfSense dashboard.

  2. In the VPN menu, select IPsec.

  3. Click + Add P1.

  4. Populate the fields according to your preferences. The important fields are (with extra emphasis on a few key fields):

    General Information

    Field Expected Value
    Key exchange version IKEv1
    Remote Gateway Enter the public IP address of the Aviatrix Gateway here.

    Phase 1 Proposal

    Phase 1 Proposal (Algorithms)

    Field Expected Value
    Encryption Algorithm AES - 256 bits
    Hash Algorithm SHA1
    DH Group 2 (1024 bit)

    Advanced Options

    Field Expected Value
    Disable rekey Unchecked


  5. Click Save.

  6. Add a Phase 2 entry. imageExamplePfSensePhase2Config

  7. Save the Phase 2 entry.

  8. Test to make sure the tunnel is up.