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The Version will be prefilled with the latest version (currently 2.4.5-p1 ) For Architecture , select AMD64 (64-bit) The Installer you want is a CD image (ISO) installer Choose a Mirror from New York, Austin TX, Frankfurt, or Singapore Click the DOWNLOAD button. By default, the file is saved in your Downloads directory. It has a name that looks like pfSense-CE-2.4.5-RELEASE-p1-amd64.iso.gz .