pfSense Community Edition (CE) 2.5.1-RELEASE was a significant maintenance update released on April 13, 2021. Its primary purpose was to address critical bugs and security vulnerabilities discovered in the initial 2.5.0 release. Official Download & Availability
Since official mirrors often clear out old versions, you have a few options for locating this specific build: Official Netgate Mirrors (Legacy): Occasionally, specific mirrors or the Netgate Community Forums Pfsense 2.5.1 Download Iso
pfSense 2.5.1 Release: The pfSense 2.5.1 release brings several bug fixes, security patches, and new features, including: pfSense Community Edition (CE) 2
Once you locate a source, follow these steps to ensure the file is safe: Download the ISO: Ensure you are getting the (64-bit) version for standard PC hardware. Verify the SHA256 Checksum: and new features