In June 2016, Amazon announced Elastic Network Adapter (ENA) on Amazon Web Services (AWS). ENA allows customers to dynamically shift between 1 Gbps, 10 Gbps, or 25 Gbps network adapter sizes fronting larger EC2 instances. This enables customers to accommodate anticipated or realized traffic spikes associated with a new product launch, product promotion, special event, etc.
With Amazon’s ENA launch, drivers were only available for Linux and Intel® Data Plane Development Kit (Intel® DPDK). Microsoft® Windows drivers became available shortly after. Recently, ENA driver support was added for FreeBSD.
With the FreeBSD drivers now available, customers running pfSense 2.4.1 (or higher) on AWS can take advantage of ENA.
Earlier versions of pfSense Firewall/VPN/Router can be updated to 2.4.1 through the pfSense dashboard. Alternatively, a new 2.4.1 instance of Netgate pfSense Firewall/VPN/Router can be initiated.
Complete instructions for enabling AWS ENA features are available in the Netgate AWS documentation.