Unlike earlier announcements suggested, pfSense 2.5.1 did not require a CPU with AES-NI support, allowing it to run on a wider range of older hardware. How to Download pfSense ISOs
Netgate has recently moved toward a registration-based download model for the Community Edition (CE): Download pfSense Community Edition Pfsense 2.5.1 Download Iso
Release 2.5.1 was notable for refining the transition to and introducing several security and performance enhancements: Unlike earlier announcements suggested, pfSense 2
Most notably, 2.5.1 removed the kernel-level WireGuard implementation out of caution, moving it to an optional package in later versions to ensure system stability. Unlike earlier announcements suggested