Hi Talget, On 23.05.22, 15:23, "talgat(a)kazrena.kz" <talgat(a)kazrena.kz> wrote: Recently I tried to install radsecproxy 1.9.1 from source to Red Hat 9 server for our Kazakhstan eduroam server, but received the error: "checking for nettle_sha256_init in -lnettle... no configure: error: required library nettle not found" I checked whether the nettle library has been installed. It has: "Package nettle-3.7.3-2.el9.x86_64 is already installed." If you compile from source, make sure to also install the -dev/-devel packages (i.e. the header files of that library). For RedHat/CentOS/Fedora I used to install these prerequisites: autoconf automake make gcc nettle-devel openssl-devel or refer to the official Fedora radsecproxy package build requirements: https://src.fedoraproject.org/rpms/radsecproxy/blob/rawhide/f/radsecproxy.s… Best regards, Fabian -- Fabian Mauchle, Network SWITCH Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland Phone +41 44 268 15 30, direct +41 44 268 15 39